Meta/CI: Remove IRC notifications

With the increased volume of PRs being opened and merged lately,
multiple people have complained that the IRC is absolutely flooded with
SerenityBot posts. Remove the IRC notifications from the CI scripts, and
the Meta script that handles parsing the github actions context into
an IRC message.

.github/workflows/cmake.yml

@@ -238,33 +238,3 @@ jobs:
         ASAN_OPTIONS: "strict_string_checks=1:check_initialization_order=1:strict_init_order=1"
         UBSAN_OPTIONS: "print_stacktrace=1:print_summary=1:halt_on_error=1"
       if: ${{ matrix.with-fuzzers == 'NO_FUZZ' }}
-
-  notify_irc:
-    needs: [build_and_test_serenity, build_and_test_lagom]
-    runs-on: ubuntu-20.04
-    if: always() && github.repository == 'SerenityOS/serenity' && (github.event_name == 'pull_request' || (github.event_name == 'push' && github.ref == 'refs/heads/master'))
-
-    steps:
-    - uses: actions/checkout@v2
-    # Sets environment variable env.WORKFLOW_CONCLUSION to one of [neutral, success, skipped, cancelled, timed_out, action_required, failure]
-    # depending on result of all needs jobs
-    - uses: technote-space/workflow-conclusion-action@v2
-
-    # === NOTIFICATIONS ===
-
-    - name: Dump event info
-      if: always()
-      # Usually unnecessary, but insanely useful if IRC notifications fail.
-      run: |
-        cat <<"EOF"
-        ${{ toJSON(github.event) }}
-        ${{ toJSON(needs) }}
-        EOF
-    - name: Generate IRC message
-      if: always()
-      run: |
-        ${{ github.workspace }}/Meta/notify_irc.py <<"EOF"
-        ["${{ github.actor }}", ${{ github.run_id }}, "${{ env.WORKFLOW_CONCLUSION }}",
-        ${{ toJSON(github.event) }}
-        ]
-        EOF