Remove bash completion for service update --network

The `--network` option is only available for `docker service create`.

Signed-off-by: Harald Albers <github@albersweb.de>

contrib/completion/bash/docker

@@ -3107,7 +3107,6 @@ _docker_service_update_and_create() {
 		--log-driver
 		--log-opt
 		--mount
-		--network
 		--replicas
 		--reserve-cpu
 		--reserve-memory
@@ -3156,6 +3155,7 @@ _docker_service_update_and_create() {
 			--host
 			--mode
 			--name
+			--network
 			--placement-pref
 			--publish -p
 			--secret