Remove legacy USE_SERIAL define (#18292)

* Remove legacy USE_SERIAL define

* tidy up missed comments

31 files changed, 1 insertions, 136 deletions

diff --git a/keyboards/lets_split/keymaps/DE_programming/config.h b/keyboards/lets_split/keymaps/DE_programming/config.h
index 145be14226..990d4ed8d5 100644
--- a/keyboards/lets_split/keymaps/DE_programming/config.h
+++ b/keyboards/lets_split/keymaps/DE_programming/config.h
@@ -18,10 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #pragma once
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/DE_simple/config.h b/keyboards/lets_split/keymaps/DE_simple/config.h
index 5a6261c4f7..470fc07854 100644
--- a/keyboards/lets_split/keymaps/DE_simple/config.h
+++ b/keyboards/lets_split/keymaps/DE_simple/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/adam/config.h b/keyboards/lets_split/keymaps/adam/config.h
index 59a2e5db72..2819051c11 100644
--- a/keyboards/lets_split/keymaps/adam/config.h
+++ b/keyboards/lets_split/keymaps/adam/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 // #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/aerialviews007/config.h b/keyboards/lets_split/keymaps/aerialviews007/config.h
index 60e23f816d..d9787a247f 100644
--- a/keyboards/lets_split/keymaps/aerialviews007/config.h
+++ b/keyboards/lets_split/keymaps/aerialviews007/config.h
@@ -26,10 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                               SONG(DVORAK_SOUND) \
                             }
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/cpeters1982/config.h b/keyboards/lets_split/keymaps/cpeters1982/config.h
index 3639b9c3f2..bff85f1414 100644
--- a/keyboards/lets_split/keymaps/cpeters1982/config.h
+++ b/keyboards/lets_split/keymaps/cpeters1982/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 // #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/default/config.h b/keyboards/lets_split/keymaps/default/config.h
index 60e23f816d..d9787a247f 100644
--- a/keyboards/lets_split/keymaps/default/config.h
+++ b/keyboards/lets_split/keymaps/default/config.h
@@ -26,10 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                               SONG(DVORAK_SOUND) \
                             }
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/dlaroe/config.h b/keyboards/lets_split/keymaps/dlaroe/config.h
index 6b31e8d14e..e898e2ed2a 100644
--- a/keyboards/lets_split/keymaps/dlaroe/config.h
+++ b/keyboards/lets_split/keymaps/dlaroe/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "config_common.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/fabian/config.h b/keyboards/lets_split/keymaps/fabian/config.h
index 6ae40cc2ba..d05757233d 100644
--- a/keyboards/lets_split/keymaps/fabian/config.h
+++ b/keyboards/lets_split/keymaps/fabian/config.h
@@ -16,8 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/lets_split/keymaps/halvves/config.h b/keyboards/lets_split/keymaps/halvves/config.h
index 70f6d13c7b..4ba90f2cae 100644
--- a/keyboards/lets_split/keymaps/halvves/config.h
+++ b/keyboards/lets_split/keymaps/halvves/config.h
@@ -20,10 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 // #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/heartrobotninja/config.h b/keyboards/lets_split/keymaps/heartrobotninja/config.h
index bb3556e574..d4193609ad 100644
--- a/keyboards/lets_split/keymaps/heartrobotninja/config.h
+++ b/keyboards/lets_split/keymaps/heartrobotninja/config.h
@@ -23,10 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-
 /* Select hand configuration */
 
 // #define MASTER_LEFT
@@ -55,4 +51,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "../../rev2fliphalf/config.h"
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/lets_split/keymaps/henxing/config.h b/keyboards/lets_split/keymaps/henxing/config.h
index 5a6261c4f7..470fc07854 100644
--- a/keyboards/lets_split/keymaps/henxing/config.h
+++ b/keyboards/lets_split/keymaps/henxing/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/hvp/config.h b/keyboards/lets_split/keymaps/hvp/config.h
index df24c53cde..43d8b0f597 100644
--- a/keyboards/lets_split/keymaps/hvp/config.h
+++ b/keyboards/lets_split/keymaps/hvp/config.h
@@ -26,10 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                               SONG(DVORAK_SOUND) \
                             }
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/khord/config.h b/keyboards/lets_split/keymaps/khord/config.h
index 71ec20dbc8..9d3cfca20d 100644
--- a/keyboards/lets_split/keymaps/khord/config.h
+++ b/keyboards/lets_split/keymaps/khord/config.h
@@ -25,11 +25,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define TAPPING_TERM 150
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 //#define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/mbsurfer/config.h b/keyboards/lets_split/keymaps/mbsurfer/config.h
index 6469b4846d..666a2012bd 100644
--- a/keyboards/lets_split/keymaps/mbsurfer/config.h
+++ b/keyboards/lets_split/keymaps/mbsurfer/config.h
@@ -25,11 +25,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define TAPPING_TERM 100
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 //#define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/mekberg/README.md b/keyboards/lets_split/keymaps/mekberg/README.md
index 5202ec8366..a24a573561 100644
--- a/keyboards/lets_split/keymaps/mekberg/README.md
+++ b/keyboards/lets_split/keymaps/mekberg/README.md
@@ -36,10 +36,6 @@ The special layer has Reset and EEP Reset keys on the left half, along with medi
 
 This option is used because otherwise modtap functions would fail to trigger. This increases reliability for me.
 
-### USE_SERIAL
-
-N/A
-
 ### EE_HANDS
 
 Prepared for EEPROM settings and different keymaps depending on USB port connected, but default master side remains left regardless.
diff --git a/keyboards/lets_split/keymaps/mekberg/config.h b/keyboards/lets_split/keymaps/mekberg/config.h
index 5523ecb5a3..41ce1b1566 100644
--- a/keyboards/lets_split/keymaps/mekberg/config.h
+++ b/keyboards/lets_split/keymaps/mekberg/config.h
@@ -24,10 +24,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define TAPPING_TERM 150
 #define PERMISSIVE_HOLD
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 //#define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/mjt/config.h b/keyboards/lets_split/keymaps/mjt/config.h
index 735a58b11a..b82efab6b0 100644
--- a/keyboards/lets_split/keymaps/mjt/config.h
+++ b/keyboards/lets_split/keymaps/mjt/config.h
@@ -16,8 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
diff --git a/keyboards/lets_split/keymaps/normacos/config.h b/keyboards/lets_split/keymaps/normacos/config.h
index 9f95a869df..e7b95250f3 100644
--- a/keyboards/lets_split/keymaps/normacos/config.h
+++ b/keyboards/lets_split/keymaps/normacos/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 // #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/pdl/config.h b/keyboards/lets_split/keymaps/pdl/config.h
index e79e132c64..89fd6ac202 100644
--- a/keyboards/lets_split/keymaps/pdl/config.h
+++ b/keyboards/lets_split/keymaps/pdl/config.h
@@ -24,11 +24,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define TAPPING_TERM 200
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 //#define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/piemod/config.h b/keyboards/lets_split/keymaps/piemod/config.h
index c3975da3ca..b0ccdb0699 100644
--- a/keyboards/lets_split/keymaps/piemod/config.h
+++ b/keyboards/lets_split/keymaps/piemod/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/pitty/config.h b/keyboards/lets_split/keymaps/pitty/config.h
index 3798f9a647..9becb13968 100644
--- a/keyboards/lets_split/keymaps/pitty/config.h
+++ b/keyboards/lets_split/keymaps/pitty/config.h
@@ -3,11 +3,6 @@
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/poker/config.h b/keyboards/lets_split/keymaps/poker/config.h
index 5a6261c4f7..470fc07854 100644
--- a/keyboards/lets_split/keymaps/poker/config.h
+++ b/keyboards/lets_split/keymaps/poker/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/pyrol/config.h b/keyboards/lets_split/keymaps/pyrol/config.h
index f3502585d4..bc0ee4be35 100644
--- a/keyboards/lets_split/keymaps/pyrol/config.h
+++ b/keyboards/lets_split/keymaps/pyrol/config.h
@@ -20,8 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define USE_SERIAL
-
 #define MASTER_LEFT
 #undef RGBLED_NUM
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/lets_split/keymaps/shaymdev/config.h b/keyboards/lets_split/keymaps/shaymdev/config.h
index 300dc47c2e..1a46cdf108 100644
--- a/keyboards/lets_split/keymaps/shaymdev/config.h
+++ b/keyboards/lets_split/keymaps/shaymdev/config.h
@@ -20,10 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define _MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/smt/config.h b/keyboards/lets_split/keymaps/smt/config.h
index 5a6261c4f7..470fc07854 100644
--- a/keyboards/lets_split/keymaps/smt/config.h
+++ b/keyboards/lets_split/keymaps/smt/config.h
@@ -23,11 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/tylerwince/config.h b/keyboards/lets_split/keymaps/tylerwince/config.h
index 6fff5478da..1dc693d24b 100644
--- a/keyboards/lets_split/keymaps/tylerwince/config.h
+++ b/keyboards/lets_split/keymaps/tylerwince/config.h
@@ -20,11 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/via/config.h b/keyboards/lets_split/keymaps/via/config.h
index 334be75194..479470a93e 100644
--- a/keyboards/lets_split/keymaps/via/config.h
+++ b/keyboards/lets_split/keymaps/via/config.h
@@ -26,10 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                               SONG(DVORAK_SOUND) \
                             }
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/vim-mode/config.h b/keyboards/lets_split/keymaps/vim-mode/config.h
index 25512a5c97..1fe4384a25 100644
--- a/keyboards/lets_split/keymaps/vim-mode/config.h
+++ b/keyboards/lets_split/keymaps/vim-mode/config.h
@@ -26,11 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                               SONG(DVORAK_SOUND) \
                             }
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 #define MASTER_LEFT
diff --git a/keyboards/lets_split/keymaps/waples/config.h b/keyboards/lets_split/keymaps/waples/config.h
index 5221fd011a..17172f729c 100644
--- a/keyboards/lets_split/keymaps/waples/config.h
+++ b/keyboards/lets_split/keymaps/waples/config.h
@@ -3,10 +3,6 @@
 
 #include "../../config.h"
 
-/* Use I2C or Serial, not both */
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 //	#define MASTER_LEFT
 //  #define MASTER_RIGHT
diff --git a/keyboards/lets_split/keymaps/yshrsmz/config.h b/keyboards/lets_split/keymaps/yshrsmz/config.h
index 301f1ffc60..23426411d9 100644
--- a/keyboards/lets_split/keymaps/yshrsmz/config.h
+++ b/keyboards/lets_split/keymaps/yshrsmz/config.h
@@ -20,11 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* auto shift config */
 #define AUTO_SHIFT_TIMEOUT 150
 
diff --git a/keyboards/lets_split/keymaps/zer09/config.h b/keyboards/lets_split/keymaps/zer09/config.h
index 3990c3dc5b..36d94824d5 100644
--- a/keyboards/lets_split/keymaps/zer09/config.h
+++ b/keyboards/lets_split/keymaps/zer09/config.h
@@ -37,11 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define USB_MAX_POWER_CONSUMPTION 50
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
-
 /* Select hand configuration */
 
 /* #define MASTER_LEFT */