Solved a bunch of -Wall errors on modern

src/map_name_popup.c

@@ -198,8 +198,7 @@ static const u8 * const sBattlePyramid_MapHeaderStrings[FRONTIER_STAGES_PER_CHAL
     sText_Pyramid,
 };
 
-// Unused
-static bool8 StartMenu_ShowMapNamePopup(void)
+static bool8 UNUSED StartMenu_ShowMapNamePopup(void)
 {
     HideStartMenu();
     ShowMapNamePopup();