ci(tests): remove timeout-minutes from weekly-regression.yaml

Author: harryswift01

.github/workflows/weekly-regression.yaml

@@ -13,7 +13,6 @@ jobs:
   regression:
     name: Regression tests (including slow)
     runs-on: ubuntu-24.04
-    timeout-minutes: 180
     steps:
       - name: Checkout repo
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6