MDEV-31545 Revert "Fix gcc warning for wsrep_plug"

This reverts commit 38fe266e.

The correct fix was pushed to the 10.4 branch
(fbc157ab)

sql/sql_parse.cc

@@ -6320,11 +6320,6 @@ static bool __attribute__ ((noinline))
 execute_show_status(THD *thd, TABLE_LIST *all_tables)
 {
   bool res;
-
-#if defined(__GNUC__) && (__GNUC__ >= 13)
-#pragma GCC diagnostic ignored "-Wdangling-pointer"
-#endif
-
   system_status_var old_status_var= thd->status_var;
   thd->initial_status_var= &old_status_var;
   WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);