rm vendor building workflow

.github/workflows/vendor_third_party.yaml

@@ -1,51 +0,0 @@
-name: vendor third_party
-
-on:
-  workflow_dispatch:
-
-jobs:
-  build:
-    if: github.ref != 'refs/heads/master'
-    strategy:
-      matrix:
-        os: [ubuntu-24.04, macos-latest]
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        submodules: true
-    - name: Build
-      run: third_party/build.sh
-    - name: Package artifacts
-      run: |
-        git add -A third_party/
-        git diff --cached --name-only -- third_party/ | tar -cf /tmp/third_party_build.tar -T -
-    - uses: actions/upload-artifact@v4
-      with:
-        name: third-party-${{ runner.os }}
-        path: /tmp/third_party_build.tar
-
-  commit:
-    needs: build
-    runs-on: ubuntu-24.04
-    permissions:
-      contents: write
-    steps:
-    - uses: actions/checkout@v6
-    - uses: actions/download-artifact@v4
-      with:
-        path: /tmp/artifacts
-    - name: Commit vendored libraries
-      run: |
-        for f in /tmp/artifacts/*/third_party_build.tar; do
-          tar xf "$f"
-        done
-        git add third_party/
-        if git diff --cached --quiet; then
-          echo "No changes to commit"
-          exit 0
-        fi
-        git config user.name "github-actions[bot]"
-        git config user.email "github-actions[bot]@users.noreply.github.com"
-        git commit -m "third_party: rebuild vendor libraries"
-        git push