refactor: unify command declaration across codebase

plugins/certs/subcommands/remove

@@ -5,10 +5,12 @@ source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 
 cmd-certs-remove() {
   declare desc="removes SSL cert/key from specified app"
-  local cmd="certs:remove"
-  [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
-  verify_app_name "$2"
-  local APP="$2"
+  declare cmd="certs:remove"
+  [[ "$1" == "$cmd" ]] && shift 1
+  declare APP="$1"
+
+  [[ -z "$APP" ]] && dokku_log_fail "Please specify an app to run the command on"
+  verify_app_name "$APP"
   local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
 
   if [[ -d "$APP_SSL_PATH" ]]; then