Remove fall-through pragmas

ui/menu.c

@@ -434,9 +434,6 @@ void UI_DisplayMenu(void)
 
 	bool already_printed = false;
 
-	#pragma GCC diagnostic push
-	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
-
 	switch (GetCurrentMenuId())
 	{
 		case MENU_SQL:
@@ -803,8 +800,6 @@ void UI_DisplayMenu(void)
 		}
 	}
 
-	#pragma GCC diagnostic pop
-
 	if (!already_printed)
 	{	// we now do multi-line text in a single string