revert the condition check (Azure#25352)

Author: xiangyan99

.github/workflows/label-needs-triage.yml

@@ -16,7 +16,6 @@ jobs:
     steps:
       - name: Label issues
         uses: andymckay/labeler@e6c4322d0397f3240f0e7e30a33b5c5df2d39e90
-        if: "${{ github.event.issue.assignees == '[]' }}"
         with:
           add-labels: "needs-triage"
           repo-token: ${{ secrets.GITHUB_TOKEN }}