Refactor alias delegation in bash completion for `secret rm|remove`

The completion logic should be implemented in the documented subcommands
(ls, rm) and delegated to from the aliases (list, remove).
For the rm|remove pair, this was implemented vice versa.

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

contrib/completion/bash/docker

@@ -4195,6 +4195,10 @@ _docker_secret_ls() {
 }
 
 _docker_secret_remove() {
+	_docker_secret_rm
+}
+
+_docker_secret_rm() {
 	case "$cur" in
 		-*)
 			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
@@ -4205,10 +4209,6 @@ _docker_secret_remove() {
 	esac
 }
 
-_docker_secret_rm() {
-	_docker_secret_remove
-}
-
 
 
 _docker_search() {