Revert "Fix duplicate event dispatch in Cocoa event pump"

This reverts commit dd52dd8995.

After that commit mouse input is not received and the window cannot be closed or resized.

Fixes https://github.com/libsdl-org/SDL/issues/14818

src/video/cocoa/SDL_cocoaevents.m

@@ -97,14 +97,6 @@ static void Cocoa_DispatchEvent(NSEvent *theEvent)
 {
     if (s_bShouldHandleEventsInSDLApplication) {
         Cocoa_DispatchEvent(theEvent);
-
-        // Avoid double-dispatching mouse and keyboard events. They are already handled in Cocoa_DispatchEvent.
-        // Other event types should still go through AppKit's normal handling.
-        NSEventType type = [theEvent type];
-        if ((type >= NSEventTypeLeftMouseDown && type <= NSEventTypeMouseExited) ||
-            (type >= NSEventTypeKeyDown && type <= NSEventTypeFlagsChanged)) {
-            return;
-        }
     }
 
     [super sendEvent:theEvent];