Revert "Set CI Tests workflow to run under pr-tests github environment" (#4160)

This reverts commit 32eb655.

Author: weiji14

.github/workflows/ci_tests.yaml

@@ -51,8 +51,6 @@ jobs:
   test:
     name: ${{ matrix.os }} - Python ${{ matrix.python-version }}
     runs-on: ${{ matrix.os }}
-    environment:
-      name: pr-tests
     permissions:
       id-token: write  # This is required for requesting OIDC token for codecov
     strategy: