Remove merch from Main Menu on mobile.

source/funkin/ui/mainmenu/MainMenuState.hx

@@ -134,8 +134,10 @@ class MainMenuState extends MusicBeatState
     // we need to open the link as an immediate result of a keypress event,
     // so we can't wait for the flicker animation to complete.
     var hasPopupBlocker = #if web true #else false #end;
+    #if desktop
     createMenuItem('merch', 'mainmenu/merch', selectMerch, hasPopupBlocker);
     #end
+    #end
 
     createMenuItem('options', 'mainmenu/options', function() {
       startExitState(() -> new funkin.ui.options.OptionsState());