Revert set-env action

Author: imatlopez

.github/workflows/tests.yml

@@ -29,12 +29,10 @@ jobs:
         run: |
           npm install --no-progress
           pip install flake8 pytest
-      - name: Set Windows environment
-        if: matrix.os == 'windows-latest'
-        run:
-          echo ::set-env name=GYP_MSVS_VERSION::2015
-          echo ::set-env name=GYP_MSVS_OVERRIDE_PATH::C:\\Dummy
       - name: Run Node tests
+        env:
+          GYP_MSVS_VERSION: 2015
+          GYP_MSVS_OVERRIDE_PATH: C:\\Dummy
         run: |
           npm test
       - name: Lint Python
@@ -45,6 +43,9 @@ jobs:
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Run Python tests
+        env:
+          GYP_MSVS_VERSION: 2015
+          GYP_MSVS_OVERRIDE_PATH: C:\\Dummy
         run: |
           python -m pytest
       # - name: Run doctests with pytest