remove unused matrix variables

Author: joeljonsson

.github/workflows/main.yml

@@ -29,17 +29,13 @@ jobs:
         include:
           - os: windows-latest
             triplet: x64-windows
-            openmp: ON
-            builddir: dist/wheelhouse
-            builddir1: dist
+            builddir: dist
           - os: ubuntu-latest
             triplet: x64-linux
             builddir: wheelhouse
-            builddir1: wheelhouse
           - os: macos-latest
             triplet: x64-osx
             builddir: wheelhouse
-            builddir1: wheelhouse
     env:
       # Indicates the CMake build directory where project files and binaries are being produced.
       CMAKE_BUILD_DIR: ${{ github.workspace }}/builddir/
@@ -116,13 +112,13 @@ jobs:
 
       - name: Run cibuildwheel
         run: |
-          python3 -m cibuildwheel --output-dir ${{matrix.builddir1}}
+          python3 -m cibuildwheel --output-dir ${{matrix.builddir}}
 
       - name: Upload wheels as artifacts
         uses: actions/upload-artifact@v2
         with:
           name: ${{ matrix.os }}-wheels
-          path: ${{matrix.builddir1}}/
+          path: ${{matrix.builddir}}/
           retention-days: 5
 
   windows-tests:
@@ -136,7 +132,6 @@ jobs:
         include:
           - os: windows-latest
             triplet: x64-windows
-            openmp: ON
 
     steps:
       - name: Checkout