[OSX] dont override dealloc methods, this is causing wierd stuff to happen.

native/Avalonia.Native/src/OSX/window.mm

@@ -729,10 +729,6 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     AvnPixelSize _lastPixelSize;
 }
 
-- (void)dealloc
-{
-}
-
 - (void)onClosed
 {
     @synchronized (self)
@@ -1226,10 +1222,6 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
     }
 }
 
-- (void)dealloc
-{
-}
-
 - (void)pollModalSession:(nonnull NSModalSession)session
 {
     auto response = [NSApp runModalSession:session];