Don't test with source install

Author: eriknw

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
         python-version: ["3.7", "3.8", "3.9", "3.10"]
-        source: ["conda-forge", "source"]
+        source: ["conda-forge"]
         graphblas-version: ["6.0.0"]
     steps:
     - name: Checkout
@@ -36,6 +36,7 @@ jobs:
     - name: GraphBLAS (from source)
       if: (contains(matrix.source, 'source'))
       run: |
+        # This isn't working!  Why not?
         # sh suitesparse.sh refs/tags/${{ matrix.graphblas-version }}
         curl -L https://github.com/DrTimothyAldenDavis/GraphBLAS/archive/refs/tags/v${{ matrix.graphblas-version }}.tar.gz | tar xzf -
         pushd GraphBLAS-${{ matrix.graphblas-version }}/build