[Chore] Remove stray mod tap interrupt defines and per key functions (#20347)

* Remove stray defines and per key functions

* Remove defunct get_ignore_mod_tap_interrupt declaration

keyboards/handwired/stef9998/split_5x7/keymaps/stef9998/keymap.c

@@ -39,20 +39,20 @@ enum custom_keycodes {
 // Shortcut to make keymap more readable
 #define KC_FN MO(_FN)
 
-bool get_ignore_mod_tap_interrupt(uint16_t keycode, keyrecord_t *record) {
+bool get_hold_on_other_key_press(uint16_t keycode, keyrecord_t *record) {
     switch (keycode) {
         case SC_LSPO:
             // Do not force the mod-tap key press to be handled as a modifier
             // if any other key was pressed while the mod-tap key is held down.
-            return false;
+            return true;
 //        case MT(MOD_LSFT,KC_9):
 //            return false;
         case SC_RSPC:
-            return false;
+            return true;
         default:
             // Force the mod-tap key press to be handled as a modifier if any
             // other key was pressed while the mod-tap key is held down.
-            return true;
+            return false;
     }
 }
 
@@ -185,4 +185,4 @@ _______ ,_______ ,RALT_T(KC_S),LCTL_T(KC_D),LSFT_T(KC_F),LT(_SYM,KC_G),_______ ,
     _______ ,_______ ,_______   ,_______   ,_______      ,_______ ,                          _______ ,_______      ,_______   ,_______   ,_______ ,_______
 // └────────┴────────┴──────────┴──────────┴─────────────┴────────┘                         └────────┴─────────────┴──────────┴──────────┴────────┴────────┘
 ),
- */
+ */