Remove broken CI workflow (#23631)

.github/workflows/ci_builds.yml

@@ -1,74 +0,0 @@
-name: CI Builds
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches: [master, develop]
-  workflow_dispatch:
-    inputs:
-      branch:
-        type: choice
-        description: 'Branch to build'
-        options: [master, develop]
-
-concurrency: ci_build-${{ github.event.inputs.branch || github.ref_name }}
-
-jobs:
-  ci_builds:
-    if: github.repository == 'qmk/qmk_firmware'
-    name: "CI Build"
-    runs-on: self-hosted
-    timeout-minutes: 1380
-
-    strategy:
-      fail-fast: false
-      matrix:
-        keymap: [default, via]
-
-    container: ghcr.io/qmk/qmk_cli
-
-    steps:
-    - name: Disable safe.directory check
-      run : git config --global --add safe.directory '*'
-
-    - uses: actions/checkout@v4
-      with:
-        submodules: recursive
-        ref: ${{ github.event.inputs.branch || github.ref }}
-
-    - name: Install dependencies
-      run: pip3 install -r requirements.txt
-
-    - name: Run `qmk mass-compile` (keymap ${{ matrix.keymap }})
-      run: |
-        export NCPUS=$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null)
-        qmk mass-compile -t -j $NCPUS -km ${{ matrix.keymap }} -e DUMP_CI_METADATA=yes || touch .failed
-        # Generate the step summary markdown
-        ./util/ci/generate_failure_markdown.sh > $GITHUB_STEP_SUMMARY || true
-        # Truncate to a maximum of 1MB to deal with GitHub workflow limit
-        truncate --size='<960K' $GITHUB_STEP_SUMMARY || true
-        # Exit with failure if the compilation stage failed
-        [ ! -f .failed ] || exit 1
-
-    - name: 'Upload artifacts'
-      uses: actions/upload-artifact@v4
-      if: always()
-      with:
-        name: artifacts-${{ github.event.inputs.branch || github.ref_name }}-${{ matrix.keymap }}
-        if-no-files-found: ignore
-        path: |
-          *.bin
-          *.hex
-          *.uf2
-          .build/failed.*
-
-    - name: 'CI Discord Notification'
-      if: always()
-      working-directory: util/ci/
-      env:
-        DISCORD_WEBHOOK: ${{ secrets.CI_DISCORD_WEBHOOK }}
-      run: |
-        python3 -m pip install -r requirements.txt
-        python3 ./discord-results.py --branch ${{ github.event.inputs.branch || github.ref_name }} --keymap ${{ matrix.keymap }} --url ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}