Remove most _keymap and _user definitions in userspace

Some keyboards misuse _user functions by defining them in the base files
instead of the corresponding _kb functions (especially led_set_user and
matrix_init_user). Until this is fixed (#5148), I've removed definitions
in my userspace that could cause linking collisions.

users/konstantin/konstantin.c

@@ -14,13 +14,6 @@ void eeconfig_init_user(void) {
   eeconfig_init_keymap();
 }
 
-__attribute__((weak))
-void matrix_init_keymap(void) {}
-
-void matrix_init_user(void) {
-  matrix_init_keymap();
-}
-
 __attribute__((weak))
 void keyboard_post_init_keymap(void) {}
 
@@ -28,13 +21,6 @@ void keyboard_post_init_user(void) {
   keyboard_post_init_keymap();
 }
 
-__attribute__((weak))
-void matrix_scan_keymap(void) {}
-
-void matrix_scan_user(void) {
-  matrix_scan_keymap();
-}
-
 __attribute__((weak))
 bool process_record_keymap(uint16_t keycode, keyrecord_t *record) {
   return true;
@@ -122,38 +108,3 @@ uint32_t layer_state_set_keymap(uint32_t state) {
 uint32_t layer_state_set_user(uint32_t state) {
   return layer_state_set_keymap(state);
 }
-
-__attribute__((weak))
-void led_set_keymap(uint8_t usb_led) {}
-
-void led_set_user(uint8_t usb_led) {
-  led_set_keymap(usb_led);
-}
-
-__attribute__((weak))
-void suspend_power_down_keymap(void) {}
-
-void suspend_power_down_user(void) {
-  suspend_power_down_keymap();
-}
-
-__attribute__((weak))
-void suspend_wakeup_init_keymap(void) {}
-
-void suspend_wakeup_init_user(void) {
-  suspend_wakeup_init_keymap();
-}
-
-__attribute__((weak))
-void startup_keymap(void) {}
-
-void startup_user(void) {  // Currently not called anywhere
-  startup_keymap();
-}
-
-__attribute__((weak))
-void shutdown_keymap(void) {}
-
-void shutdown_user(void) {
-  shutdown_keymap();
-}

users/konstantin/konstantin.h

@@ -71,15 +71,7 @@ enum layers_user {
 
 void keyboard_pre_init_keymap(void);
 void eeconfig_init_keymap(void);
-void matrix_init_keymap(void);
 void keyboard_post_init_keymap(void);
 
-void matrix_scan_keymap(void);
 bool process_record_keymap(uint16_t keycode, keyrecord_t *record);
 uint32_t layer_state_set_keymap(uint32_t state);
-void led_set_keymap(uint8_t usb_led);
-
-void suspend_power_down_keymap(void);
-void suspend_wakeup_init_keymap(void);
-void startup_keymap(void);
-void shutdown_keymap(void);