shorten GH actions pipeline to three Python versions

.github/workflows/ci-pipeline.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-2022]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.10", "3.11"]
     steps:
       - uses: actions/checkout@v3
       - if: matrix.os == 'ubuntu-latest'
@@ -21,7 +21,6 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install requirements
         run: |
-          pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
           pip install -r test/requirements.txt
           pip install -r test/torch_requirements.txt
           pip install .
@@ -43,7 +42,6 @@ jobs:
           python-version: 3.9
       - name: Generate coverage report
         run: |
-          pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
           pip install -r test/requirements.txt
           pip install -r test/torch_requirements.txt
           pip install .