Drop method to set Unicode input key and declare start and finish methods as “weak” instead

quantum/process_keycode/process_unicode.c

@@ -1,7 +1,6 @@
 #include "process_unicode.h"
 
 static uint8_t input_mode;
-static uint16_t linux_key = UNICODE_LNX_KEY;
 
 uint16_t hex_to_keycode(uint8_t hex)
 {
@@ -19,11 +18,7 @@ void set_unicode_input_mode(uint8_t os_target)
   input_mode = os_target;
 }
 
-void set_unicode_input_key_lnx(uint16_t key)
+__attribute__((weak))
-{
-  linux_key = key;
-}
-
 void unicode_input_start (void) {
   switch(input_mode) {
   case UC_OSX:
@@ -32,8 +27,8 @@ void unicode_input_start (void) {
   case UC_LNX:
     register_code(KC_LCTL);
     register_code(KC_LSFT);
-    register_code(linux_key);
+    register_code(KC_U);
-    unregister_code(linux_key);
+    unregister_code(KC_U);
     unregister_code(KC_LSFT);
     unregister_code(KC_LCTL);
     break;
@@ -46,6 +41,7 @@ void unicode_input_start (void) {
   wait_ms(UNICODE_TYPE_DELAY);
 }
 
+__attribute__((weak))
 void unicode_input_finish (void) {
   switch(input_mode) {
   case UC_OSX:

quantum/process_keycode/process_unicode.h

@@ -8,16 +8,11 @@
 #define UC_WIN 2
 #define UC_BSD 3
 
-#ifndef UNICODE_LNX_KEY
-#define UNICODE_LNX_KEY KC_A
-#endif
-
 #ifndef UNICODE_TYPE_DELAY
 #define UNICODE_TYPE_DELAY 10
 #endif
 
 void set_unicode_input_mode(uint8_t os_target);
-void set_unicode_input_key_lnx(uint16_t linux_key);
 void unicode_input_start(void);
 void unicode_input_finish(void);
 void register_hex(uint16_t hex);