Never consider the case where client requests higher version

Created by: acrisci

A lot of the code for global binding does something like this:

if (version > 1) {
	wlr_log(L_ERROR, "Client requested unsupported surface_layers version,"
		"disconnecting");
	wl_client_destroy(wl_client);
	return;
}

That code will never be reached. If they try to bind to a version higher, wl_registry will disconnect the client for you.

wl_registry@2: error 0: invalid version for global surface_layers (8): have 1, wanted 2