staging: greybus: Remove unused local variable

Fixes the following W=1 warning: variable ‘intf_id’ set but
not used [-Wunused-but-set-variable]
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/svc.c

@@ -1137,7 +1137,6 @@ static int gb_svc_intf_reset_recv(struct gb_operation *op)
 	struct gb_svc *svc = gb_connection_get_data(op->connection);
 	struct gb_message *request = op->request;
 	struct gb_svc_intf_reset_request *reset;
-	u8 intf_id;
 
 	if (request->payload_size < sizeof(*reset)) {
 		dev_warn(&svc->dev, "short reset request received (%zu < %zu)\n",
@@ -1146,8 +1145,6 @@ static int gb_svc_intf_reset_recv(struct gb_operation *op)
 	}
 	reset = request->payload;
 
-	intf_id = reset->intf_id;
-
 	/* FIXME Reset the interface here */
 
 	return 0;