remove old auto-formte implimentaion (RustPython#6251)

Signed-off-by: Yash Suthar <yashsuthar983@gmail.com>

Author: YashSuthar983

.github/workflows/ci.yaml

@@ -448,55 +448,3 @@ jobs:
         run: wasmer run --dir `pwd` target/wasm32-wasip1/release/rustpython.wasm -- `pwd`/extra_tests/snippets/stdlib_random.py
       - name: run cpython unittest
         run: wasmer run --dir `pwd` target/wasm32-wasip1/release/rustpython.wasm -- `pwd`/Lib/test/test_int.py
-
-  auto_format_commit:
-    needs: [rust_tests, exotic_targets, snippets_cpython, lint, miri, wasm, wasm-wasi]
-    permissions:
-      contents: write
-      pull-requests: write
-    name: Auto-format code
-    runs-on: ubuntu-latest
-    if: ${{ !contains(github.event.head_commit.message, '[skip ci]') }}
-    concurrency:
-      group: fmt-${{ github.ref }}
-      cancel-in-progress: true
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 0
-          ref: ${{ github.head_ref || github.ref_name }}
-
-      - name: Setup Rust
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
-
-      - name: Run cargo fmt
-        run: |
-          echo "Running cargo fmt --all"
-          cargo fmt --all
-
-      - name: Commit and push if changes
-        id: commit
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          if [ -n "$(git status --porcelain)" ]; then
-            git add -u
-            git commit -m "Auto-format code [skip ci]"
-            git push
-            echo "formatted=true" >> $GITHUB_OUTPUT
-          else
-            echo "formatted=false" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Comment on PR if formatting was applied
-        if: steps.commit.outputs.formatted == 'true' && github.event_name == 'pull_request'
-        uses: marocchino/sticky-pull-request-comment@v2
-        with:
-          message: |
-            Code has been automatically formatted.
-            No action needed.
-            the changes were committed with `[skip ci]`.