x11drv: Don't send an invalid WM_NCCREATE to the desktop window.

dlls/x11drv/desktop.c

@@ -80,8 +80,6 @@ static DWORD CALLBACK desktop_thread( LPVOID driver_data )
     XMapWindow( display, root_window );
     wine_tsx11_unlock();
 
-    SendMessageW( hwnd, WM_NCCREATE, 0, 0 /* should be CREATESTRUCT */ );
-
     while (GetMessageW( &msg, hwnd, 0, 0 )) DispatchMessageW( &msg );
     return 0;
 }