remove wheel testing. difficult to get working

.github/workflows/build_tests.yml

@@ -80,18 +80,6 @@ jobs:
     - name: Import wntr
       run: |
         python -c "import wntr"
-    - name: Checkout requirements.txt
-      uses: actions/checkout@v4
-      with:
-        sparse-checkout: |
-          requirements.txt
-          wntr/tests/
-        sparse-checkout-cone-mode: false
-        fetch-depth: 1
-    - name: Test wntr
-      run: |
-        pip install -r requirements.txt
-        coverage run --context=${{ matrix.os }}.py${{ matrix.python-version }} --source=wntr --omit="*/tests/*","*/sim/network_isolation/network_isolation.py","*/sim/aml/evaluator.py" -m pytest  --doctest-modules --doctest-glob="*.rst" wntr
   pytest_coverage:
     runs-on: ${{ matrix.os }}
     strategy: