remove github/jackaudio specific irc integration

.github/workflows/irc.yml

@@ -1,20 +0,0 @@
-name: irc
-
-on: [push]
-
-jobs:
-  notification:
-    runs-on: ubuntu-latest
-    name: IRC notification
-    steps:
-      - name: Format message
-        id: message
-        run: |
-          message="${{ github.actor }} pushed $(echo '${{ github.event.commits[0].message }}' | head -n 1) ${{ github.event.commits[0].url }}"
-          echo ::set-output name=message::"${message}"
-      - name: IRC notification
-        uses: Gottox/irc-message-action@v2
-        with:
-          channel: '#jack'
-          nickname: jackaudio-bot
-          message: ${{ steps.message.outputs.message }}