Remove SERIAL_MOUSE (qmk#14969)

quantum/keyboard.c

@@ -40,9 +40,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef PS2_MOUSE_ENABLE
 #    include "ps2_mouse.h"
 #endif
-#ifdef SERIAL_MOUSE_ENABLE
-#    include "serial_mouse.h"
-#endif
 #ifdef RGBLIGHT_ENABLE
 #    include "rgblight.h"
 #endif
@@ -310,9 +307,6 @@ void keyboard_init(void) {
 #ifdef PS2_MOUSE_ENABLE
     ps2_mouse_init();
 #endif
-#ifdef SERIAL_MOUSE_ENABLE
-    serial_mouse_init();
-#endif
 #ifdef BACKLIGHT_ENABLE
     backlight_init();
 #endif
@@ -490,10 +484,6 @@ void keyboard_task(void) {
     ps2_mouse_task();
 #endif
 
-#ifdef SERIAL_MOUSE_ENABLE
-    serial_mouse_task();
-#endif
-
 #ifdef POINTING_DEVICE_ENABLE
     pointing_device_task();
 #endif

tmk_core/protocol.mk

@@ -1,25 +1,5 @@
 PROTOCOL_DIR = protocol
 
-ifeq ($(strip $(SERIAL_MOUSE_MICROSOFT_ENABLE)), yes)
-    SRC += $(PROTOCOL_DIR)/serial_mouse_microsoft.c
-    OPT_DEFS += -DSERIAL_MOUSE_ENABLE -DSERIAL_MOUSE_MICROSOFT \
-                -DMOUSE_ENABLE
-endif
-
-ifeq ($(strip $(SERIAL_MOUSE_MOUSESYSTEMS_ENABLE)), yes)
-    SRC += $(PROTOCOL_DIR)/serial_mouse_mousesystems.c
-    OPT_DEFS += -DSERIAL_MOUSE_ENABLE -DSERIAL_MOUSE_MOUSESYSTEMS \
-                -DMOUSE_ENABLE
-endif
-
-ifeq ($(strip $(SERIAL_MOUSE_USE_SOFT)), yes)
-    SRC += $(PROTOCOL_DIR)/serial_soft.c
-endif
-
-ifeq ($(strip $(SERIAL_MOUSE_USE_UART)), yes)
-    SRC += $(PROTOCOL_DIR)/serial_uart.c
-endif
-
 ifeq ($(strip $(USB_HID_ENABLE)), yes)
     include $(TMK_DIR)/protocol/usb_hid.mk
 endif