remove IRC notif from CI as it doesn't seem to be still valuable these days

.github/workflows/github-actions.yml

@@ -96,18 +96,6 @@ jobs:
         cd docs
         make html-readthedocs
 
-  irc_notification:
-    runs-on: ubuntu-latest
-    needs: [linting, test]
-    steps:
-      - uses: rectalogic/notify-irc@v1
-        if: success()
-        with:
-          channel: "irc.freenode.org#mongoengine"
-          nickname: github-notifier
-          message: |
-            Build ${{ job.status }} - ${{ github.actor }} ${{ github.event_name }} ${{ github.event.ref }}
-
   build-n-publish-dummy:
     runs-on: ubuntu-latest
     needs: [linting, test, build_doc_dryrun]