Don't repeat env vars

Author: agriyakhetarpal

.github/workflows/build-wheels.yml

@@ -146,12 +146,6 @@ jobs:
           output-dir: wheelhouse
           package-dir: statsmodels
 
-        env:
-          CIBW_BEFORE_BUILD: 'git submodule foreach git checkout  ${{ env.BUILD_COMMIT }}'
-          CIBW_PLATFORM: pyodide
-          CIBW_TEST_REQUIRES: pytest
-          CIBW_TEST_COMMAND: python -c "import statsmodels; statsmodels.test(['--skip-examples','--skip-slow'])
-
       - name: Setup Upload Variables
         if: ${{ always() }}
         shell: bash