fix: stop forwarding deployed tag from config:set restart

Reverts the earlier triggerRestart change. Forwarding the numeric tag forces
release_and_deploy to look up `dokku/<app>:N` (the bare local name), which
was never tagged when image-repo overrides the default. `fn-verify-app-image`
then retag-after-pulls and the underlying image ID ends up with two tags,
which prevents scheduler-docker-local's image retire path from removing the
old numeric tag (it uses unforced `docker image remove`).

plugins/config/config.go

@@ -144,12 +144,10 @@ func triggerRestart(appName string) {
 		return
 	}
 
-	imageTag, _ := common.GetRunningImageTag(appName, "")
-
 	common.LogInfo1(fmt.Sprintf("Restarting app %s", appName))
 	_, err := common.CallPlugnTrigger(common.PlugnTriggerInput{
 		Trigger:     "release-and-deploy",
-		Args:        []string{appName, imageTag, "config-redeploy"},
+		Args:        []string{appName, "", "config-redeploy"},
 		StreamStdio: true,
 	})
 	if err != nil {