Remove redundant KC_TRNS and KC_NO fillers in remaining keymaps (#5154)

keyboards/lets_split/keymaps/that_canadian/keymap.c

@@ -22,10 +22,6 @@ enum custom_keycodes {
   BACKLIT
 };
 
-// Fillers to make layering more clear
-#define _______ KC_TRNS
-#define XXXXXXX KC_NO
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 /* Qwerty
@@ -160,4 +156,4 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
       break;
   }
   return true;
-}
+}