Remove double cursor workaround in client

We've fixed the issue more properly in the server now, so remove the
workaround we had in the client.

vncviewer/Viewport.cxx

@@ -179,12 +179,6 @@ Viewport::Viewport(int w, int h, const rfb::PixelFormat& serverPF, CConn* cc_)
   setMenuKey();
 
   OptionsDialog::addCallback(handleOptions, this);
-
-  // Send a fake pointer event so that the server will stop rendering
-  // a server-side cursor. Ideally we'd like to send the actual pointer
-  // position, but we can't really tell when the window manager is done
-  // placing us so we don't have a good time for that.
-  handlePointerEvent(Point(w/2, h/2), 0);
 }