Revert "[CI] Set one hour time limit for llvm-test-suite" (#8362)

Reverts #8287

Apparently composite actions do not support timeout. See
actions/runner#1979.

Author: bader

devops/actions/llvm_test_suite/action.yml

@@ -43,7 +43,6 @@ inputs:
 post-if: false
 runs:
   using: "composite"
-  timeout-minutes: 60
   steps:
   - run: |
       cp -r /actions .