Remove Windows from code coverage

Author: iamtakingithard

.github/workflows/coverage.yml

@@ -10,20 +10,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        build: [stable, macos, win-msvc, win-gnu]
+        build: [stable, macos]
         include:
         - build: stable
           os: ubuntu-latest
           rust: nightly
         - build: macos
           os: macos-latest
           rust: nightly
-        - build: win-msvc
-          os: windows-latest
-          rust: nightly
-        - build: win-gnu
-          os: windows-2019
-          rust: nightly-x86_64-gnu
     steps:
     - name: 'Checkout repository'
       uses: actions/checkout@v2.3.4