Remove legacy sendstring keycodes (#18749)

users/billypython/billypython.c

@@ -13,7 +13,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   switch (keycode) {
   case CLEAR:
     if (record->event.pressed) {
-      SEND_STRING(SS_LCTRL("a") SS_TAP(X_DELETE));
+      SEND_STRING(SS_LCTL("a") SS_TAP(X_DELETE));
     }
     return false;