fix: don't comment in licon-pipelines-webext when reporting no-jobs

This CL fixes the following issue which ocurred when trying to report
no-jobs in Gitlab:

```
Unable to POST on
https://__CENSORED__/api/v4/projects/__CENSORED__/merge_requests/6/notes
(code: 400) due to: {'message': '400 Bad request - Note {:note=>["can't
be blank"]}'}
```

Change-Id: I38a58666cb556e1d564381e33ba094dae320852b
diff --git a/zuul.d/pipelines.yaml b/zuul.d/pipelines.yaml
index 4760819..b7520ef 100644
--- a/zuul.d/pipelines.yaml
+++ b/zuul.d/pipelines.yaml
@@ -45,7 +45,6 @@
           state: NOT_RELEVANT
           message: 'No jobs were triggered'
       licon-pipelines-webext:
-        comment: True
         approval: True
     dequeue:
       gerrit: