Remove Visual Studio 2017 jobs, no longer supported by GitHub

Author: d-frey

.github/workflows/windows.yml

@@ -110,31 +110,3 @@ jobs:
 
     - working-directory: build/
       run: ctest -C ${{ matrix.build_type }} --output-on-failure
-
-  vs2017:
-    strategy:
-      fail-fast: false
-      matrix:
-        visual_studio:
-          - 'Visual Studio 15 2017'
-          - 'Visual Studio 15 2017 Win64'
-        build_type: [Debug, Release]
-
-    runs-on: windows-2016
-
-    steps:
-    - uses: actions/checkout@v2
-      with:
-        submodules: recursive
-
-    - run: cmake -E make_directory build
-
-    - shell: bash
-      working-directory: build/
-      run: cmake $GITHUB_WORKSPACE -G "${{ matrix.visual_studio }}"
-
-    - working-directory: build/
-      run: cmake --build . --config ${{ matrix.build_type }}
-
-    - working-directory: build/
-      run: ctest -C ${{ matrix.build_type }} --output-on-failure