Use trusted publishing with both PyPI and TestPyPI

.github/workflows/build.yml

@@ -146,17 +146,6 @@ jobs:
         if: >-
           github.event_name == 'pull_request'
 
-        with:
-          # Authenticate using a token from a PyPI account with upload
-          # permission to the project.  See https://pypi.org/help/#apitoken
-          user: "__token__"
-          # Read it from a GitHub Actions "environment" secret.  See
-          # https://docs.github.com/en/actions/security-guides/encrypted-secrets
-          password: "${{ secrets.testpypi_token }}"
-          # Override the default in order to upload it to the testing
-          # deployment.
-          repository_url: "https://test.pypi.org/legacy/"
-
       # Now define a conditional step to upload packages to the production
       # instance of PyPI.
       #
@@ -168,7 +157,3 @@ jobs:
         if: >-
           github.event_name == 'push' &&
           startsWith(github.event.ref, 'refs/tags/zfec-')
-
-        with:
-          user: "__token__"
-          password: "${{ secrets.pypi_token }}"