greybus: lights: remove unnecessary checks

We do not need to check for channels and lights as they can never be
NULL as a big memory array elements.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Reported-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/light.c

@@ -1026,9 +1026,6 @@ static void gb_lights_channel_free(struct gb_channel *channel)
 
 static void gb_lights_channel_release(struct gb_channel *channel)
 {
-	if (!channel)
-		return;
-
 	channel->releasing = true;
 
 	gb_lights_channel_unregister(channel);
@@ -1041,8 +1038,6 @@ static void gb_lights_light_release(struct gb_light *light)
 	int i;
 	int count;
 
-	if (!light)
-		return;
 
 	count = light->channels_count;