Revert "fix public repo forked builds (#25280)" (#25290)

This reverts commit 657ed54.

Co-authored-by: Mike Surowiec <[email protected]>

Author: Peter Bengtsson

.github/workflows/azure-preview-env-deploy.yml

@@ -150,9 +150,8 @@ jobs:
         name: Check out user code to temp directory
         uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
-          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}
-          ref: ${{ env.COMMIT_REF }}
           path: ./user-code
+          ref: ${{ env.COMMIT_REF }}
 
       # Move acceptable user changes into our main branch checkout
       - if: ${{ env.IS_PUBLIC_BUILD == 'true' }}