ci: drop redundant branch comment from pinned SDK workflow ref

Author: spydon

.github/workflows/sync-compliance.yml

@@ -10,7 +10,7 @@ jobs:
     permissions:
       contents: write
       pull-requests: write
-    uses: supabase/sdk/.github/workflows/sync-sdk-compliance.yml@faba359a57d270bbbf68fd6b583db0604ddce8af # main
+    uses: supabase/sdk/.github/workflows/sync-sdk-compliance.yml@faba359a57d270bbbf68fd6b583db0604ddce8af
     secrets:
       app-id: ${{ secrets.GH_APP_ID }}
       private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}