[Fix][CI] Remove dead link check from sanity check (#9274)

Author: Hisoka-X

.github/workflows/backend.yml

@@ -85,15 +85,14 @@ jobs:
 
   sanity-check:
     name: Sanity check results
-    needs: [ license-header, code-style, dead-link ]
+    needs: [ license-header, code-style ]
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
       - name: Check results
         run: |
           [[ ${{ needs.license-header.result }} == 'success' ]] || exit 1;
           [[ ${{ needs.code-style.result }} == 'success' ]] || exit 1;
-          [[ ${{ needs.dead-link.result }} == 'success' ]] || exit 1;
 
   changes:
     runs-on: ubuntu-latest