Remove: env for build

.github/workflows/build-pypi.yml

@@ -15,18 +15,16 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.6.7"]
+        python-version: ["3.6"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
-      env:
-        AGENT_TOOLSDIRECTORY: /opt/hostedtoolcache
 
     - name: Install dependencies
       run: |