Simplifies Python wheel build on CI

.github/workflows/build.yml

@@ -69,25 +69,17 @@ jobs:
       - run: source ../venv/bin/activate && sphinx-build -M html . build
         working-directory: ./python/docs
 
-  python_wheel_linux:
+  python_wheel:
-    runs-on: ubuntu-latest
-    needs: python
-    steps:
-      - uses: actions/checkout@v2
-      - run: docker run --rm -v $(pwd):/io konstin2/maturin build
-        working-directory: ./python
-
-  python_wheel_mac_windows:
     runs-on: ${{ matrix.os }}
     needs: python
     strategy:
       matrix:
-        os: [ macos-latest, windows-latest ]
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
           python-version: 3.6
       - run: pip install maturin
-      - run: maturin build --no-sdist
+      - run: maturin build
         working-directory: ./python