greybus: lights: remove unnecessary check

lights can never be NULL at that point since lights_count must be different than
zero, and we need only to validate the light_id.
Reported-by: NJohan Hovold <johan@hovoldconsulting.com>
Signed-off-by: NRui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/light.c

@@ -1178,7 +1178,7 @@ static int gb_lights_request_handler(struct gb_operation *op)
 	payload = request->payload;
 	light_id = payload->light_id;
 
-	if (light_id >= glights->lights_count || !glights->lights ||
+	if (light_id >= glights->lights_count ||
 	    !glights->lights[light_id].ready) {
 		dev_err(dev, "Event received for unconfigured light id: %d\n",
 			light_id);