Drop macOS

Author: termoshtt

.github/workflows/openblas.yml

@@ -35,29 +35,3 @@ jobs:
             --manifest-path=ndarray-linalg/Cargo.toml
             --no-default-features
             --features=openblas-${{ matrix.feature }}
-
-  macos:
-    runs-on: macos-10.15
-    strategy:
-      fail-fast: false
-      matrix:
-        feature:
-          - static
-          - system
-    steps:
-      - uses: actions/checkout@v1
-        with:
-          submodules: 'recursive'
-      - name: Install OpenBLAS by homebrew
-        run: |
-          brew install openblas
-        if: ${{ contains(matrix.feature, 'system') }}
-      - run: |
-          export LIBRARY_PATH=$(readlink -f $(dirname $(gfortran -print-file-name libgfortran.a)))
-      - uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: >
-            --manifest-path=ndarray-linalg/Cargo.toml
-            --no-default-features
-            --features=openblas-${{ matrix.feature }}