fix: remove prod_vectors job timeout (#625)

Author: unnawut

.github/workflows/prod-vectors.yml

@@ -49,7 +49,7 @@ jobs:
     # Trick to run even when keygen was skipped, but not on failure or cancel.
     if: always() && !failure() && !cancelled()
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+
     steps:
       - name: Checkout leanSpec
         uses: actions/checkout@v4