Update check-restricted-files.yaml

Author: ralfhandl

.github/workflows/check-restricted-files.yaml

@@ -27,12 +27,8 @@ jobs:
           echo github.event_name=${{ github.event_name }}
           echo github.event.pull_request.base.sha=${{ github.event.pull_request.base.sha }}
           echo github.event.pull_request.base.ref=${{ github.event.pull_request.base.ref }}
-          echo HEAD=$HEAD
           echo github.event.pull_request.head.sha=${{ github.event.pull_request.head.sha }}
           echo github.event.pull_request.head.ref=${{ github.event.pull_request.head.ref }}
-
+          echo
           echo Diff between head and base sha
           git diff --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} -- versions
-
-        env:
-          HEAD: ${{ github.ref_name }}