wined3d: Don't clear the GL context such that it can't be restored.

dlls/wined3d/device.c

@@ -1016,9 +1016,6 @@ HRESULT CDECL wined3d_device_uninit_3d(struct wined3d_device *device)
     if (!device->d3d_initialized)
         return WINED3DERR_INVALIDCALL;
 
-    /* Force making the context current again, to verify it is still valid
-     * (workaround for broken drivers) */
-    context_set_current(NULL);
     /* I don't think that the interface guarantees that the device is destroyed from the same thread
      * it was created. Thus make sure a context is active for the glDelete* calls
      */