CI: Remove nightly Clang toolchain GitHub Action

Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/86069fa28d9
Pull-request: https://github.com/SerenityOS/serenity/pull/9458

.github/workflows/clang.yml

@@ -1,97 +0,0 @@
-name: Clang toolchain status
-on:
-  schedule:
-    - cron: '0 0 * * *'
-
-jobs:
-  build_and_test_serenity:
-    runs-on: ubuntu-20.04
-    strategy:
-      fail-fast: false
-      matrix:
-        arch: [ 'i686', 'x86_64' ]
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Install Ubuntu dependencies
-        run: |
-          sudo add-apt-repository ppa:canonical-server/server-backports
-          sudo apt-get update
-          sudo apt-get install libmpfr-dev libmpc-dev ninja-build e2fsprogs qemu-utils qemu-system-i386
-
-      - name: Check versions
-        run: set +e; g++ --version; g++-10 --version; ninja --version; qemu-system-i386 --version
-
-      - name: Regenerate Toolchain
-        run: TRY_USE_LOCAL_TOOLCHAIN=y ARCH="${{ matrix.arch }}" ${{ github.workspace }}/Toolchain/BuildClang.sh
-
-      - name: Create build directory
-        run: |
-          mkdir -p ${{ github.workspace }}/Build
-          mkdir -p ${{ github.workspace }}/Build/UCD
-
-      - name: UnicodeData cache
-        # TODO: Change the version to the released version when https://github.com/actions/cache/pull/489 (or 571) is merged.
-        uses: actions/cache@03e00da99d75a2204924908e1cca7902cafce66b
-        with:
-          path: ${{ github.workspace }}/Build/UCD
-          key: UnicodeData-${{ hashFiles('Userland/Libraries/LibUnicode/unicode_data.cmake') }}
-
-      - name: Create build environment
-        working-directory: ${{ github.workspace }}/Build
-        run: cmake .. -GNinja -DSERENITY_ARCH=${{ matrix.arch }} -DUSE_CLANG_TOOLCHAIN=ON -DENABLE_UNDEFINED_SANITIZER=ON -DENABLE_PCI_IDS_DOWNLOAD=OFF -DENABLE_USB_IDS_DOWNLOAD=OFF -DCMAKE_C_COMPILER=gcc-10 -DCMAKE_CXX_COMPILER=g++-10
-
-      - name: Build Serenity and Tests
-        working-directory: ${{ github.workspace }}/Build
-        run: cmake --build .
-
-      - name: Create Serenity Rootfs
-        working-directory: ${{ github.workspace }}/Build
-        run: ninja install && ninja image
-
-      - name: Run On-Target Tests
-        working-directory: ${{ github.workspace }}/Build
-        env:
-          SERENITY_QEMU_CPU: "max,vmx=off"
-          SERENITY_KERNEL_CMDLINE: "boot_mode=self-test"
-          SERENITY_RUN: "ci"
-        run: |
-          echo "::group::ninja run # Qemu output"
-          ninja run
-          echo "::endgroup::"
-          echo "::group::Verify Output File"
-          mkdir fsmount
-          sudo mount -t ext2 -o loop,rw _disk_image fsmount
-          echo "Results: "
-          sudo cat fsmount/home/anon/test-results.log
-          if ! sudo grep -q "Failed: 0" fsmount/home/anon/test-results.log
-          then
-            echo "::error :^( Tests failed, failing job"
-            exit 1
-          fi
-          echo "::endgroup::"
-        timeout-minutes: 60
-
-      - name: Print Target Logs
-        # Extremely useful if Serenity hangs trying to run one of the tests
-        if: ${{ !cancelled() }}
-        working-directory: ${{ github.workspace }}/Build
-        run: '[ ! -e debug.log ] || cat debug.log'
-
-  notify_discord:
-    runs-on: ubuntu-20.04
-    needs: build_and_test_serenity
-    if: always()
-    steps:
-      - uses: actions/checkout@v2
-      - uses: technote-space/workflow-conclusion-action@v2
-      - name: Send discord notification
-        env:
-          DISCORD_WEBHOOK: ${{ secrets.DISCORD_CLANG_WEBHOOK }}
-          DISCORD_USERNAME: GitHub # we have to set these manually for non-default messages
-          DISCORD_AVATAR: https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png
-        uses: IdanHo/action-discord@754598254f288e6d8e9fca637832e3c163515ba8
-        with:
-          args: "The clang build ${{ env.WORKFLOW_CONCLUSION == 'success' && 'passed :white_check_mark:' || 'failed :x:' }} https://github.com/SerenityOS/serenity/actions/runs/${{github.run_id}}"
-