set coverage to use same package versions

.github/workflows/python-package.yml

@@ -58,11 +58,7 @@ jobs:
                 os: [ubuntu-latest]
                 # DESI 24.4 release
                 python-version: ['3.10']
-                astropy-version: ['==6.0.1']
                 fitsio-version: ['==1.2.1']
-                numpy-version: ['==1.22.4']
-                scipy-version: ['==1.8.1']
-                matplotlib-version: ['==3.8.4']
         env:
             DESIUTIL_VERSION: 3.4.2
             DESIMODEL_DATA: branches/test-0.17
@@ -81,14 +77,10 @@ jobs:
                 python -m pip install --upgrade pip setuptools wheel
                 python -m pip install pytest pytest-cov coveralls
                 python -m pip install git+https://github.com/desihub/desiutil.git@${DESIUTIL_VERSION}#egg=desiutil
-                python -m pip install -U 'numpy${{ matrix.numpy-version }}'
-                python -m pip install -U 'astropy${{ matrix.astropy-version }}'
+                python -m pip install -U --no-deps scipy
                 python -m pip cache remove fitsio
                 python -m pip install --no-deps --force-reinstall --ignore-installed 'fitsio${{ matrix.fitsio-version }}'
                 python -m pip install pyyaml requests
-                python -m pip install -U 'scipy${{ matrix.scipy-version }}'
-                python -m pip install -U 'matplotlib${{ matrix.matplotlib-version }}'
-                python -m pip install healpy
                 svn export https://desi.lbl.gov/svn/code/desimodel/${DESIMODEL_DATA}/data
                 # grab surveyops snapshot
                 wget https://data.desi.lbl.gov/public/epo/example_files/surveyops_2.0_ops.tar.gz
@@ -109,7 +101,6 @@ jobs:
             matrix:
                 os: [ubuntu-latest]
                 python-version: ['3.10']
-
         steps:
             - name: Checkout code
               uses: actions/checkout@v2