ci: remove PyPy tests (tree-sitter incompatible with PyPy)

Author: nikolay-e

.github/workflows/ci.yml

@@ -146,45 +146,6 @@ jobs:
             test-results.xml
           retention-days: 1
 
-  # ============================================================================
-  # PyPy Compatibility Testing
-  # ============================================================================
-  test-pypy:
-    needs: [pre-commit, lint-type-check]
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: [pypy-3.10, pypy-3.11]
-
-    steps:
-      - name: Checkout Code
-        uses: actions/checkout@v6
-
-      - name: Set up PyPy ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Cache pip Dependencies
-        uses: actions/cache@v5
-        with:
-          path: ~/.cache/pip
-          key: pypy-${{ matrix.python-version }}-pip-${{ hashFiles('**/pyproject.toml') }}
-          restore-keys: |
-            pypy-${{ matrix.python-version }}-pip-
-
-      - name: Install Dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install -e .
-          pip install pytest
-
-      - name: Run Tests
-        run: pytest -v
-
   # ============================================================================
   # Mutation Testing (test effectiveness validation)
   # Evidence: Mutation score correlates with real fault detection