Fix: remove permissions block that breaks reusable workflow

Author: gyohuangxin

.github/workflows/atom-test.yaml

@@ -20,10 +20,6 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
 
-permissions:
-  contents: read
-  actions: read
-
 env:
   ATOM_BASE_IMAGE: rocm/pytorch:latest
   GITHUB_REPO_URL: ${{ github.event.pull_request.head.repo.clone_url || 'https://github.com/ROCm/ATOM.git' }}