Remove tests for free-threaded support

.github/workflows/tests.yml

@@ -40,26 +40,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip setuptools numpy scipy hypothesis pytest torch gpytorch
           pip install --progress-bar off .
-      - run: python -m pytest tests --ignore=tests/test_free_threaded.py
-  test-free-threaded:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      # TODO: Replace deadsnakes with setup-python when the support for Python 3.13t is added
-      - name: Setup Python 3.13t
-        uses: deadsnakes/action@v3.1.0
-        with:
-          python-version: "3.13-dev"
-          nogil: true
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip setuptools numpy hypothesis pytest pytest-freethreaded
-          pip install --progress-bar off .
-      - run: python -m pytest --threads 1 --iterations 1 tests --ignore=tests/test_free_threaded.py
-      # TODO: Using `unittest` style causes `pytest-freethreaded` to fail with `ConcurrencyError`.
-      #       Rewriting as top-level functions works,
-      #       so a follow-up is needed to refactor from `unittest` to `pytest`.
-      - run: python -m pytest --threads 1 --iterations 1 --require-gil-disabled tests/test_free_threaded.py
+      - run: python -m pytest tests
   test-numpy2:
     runs-on: ubuntu-latest
     steps:
@@ -73,4 +54,4 @@ jobs:
           python -m pip install --upgrade pip setuptools scipy hypothesis pytest torch gpytorch
           python -m pip install --pre --upgrade numpy
           pip install --progress-bar off .
-      - run: python -m pytest tests --ignore=tests/test_free_threaded.py
+      - run: python -m pytest tests