Undo canary workaround (#2779)

Author: sobolk

.github/workflows/canary_checks.yml

@@ -44,10 +44,6 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # version 4.1.4
-        with:
-          # TODO temporarily pin to pre-pretty sandbox until we ship that
-          # Branch contains repo at 0cc2de3ae15f09a9eec5b9e0d54f0bae474c7aa9 plus changes to build step caching
-          ref: pre-pretty-sandbox-branch
       - name: Run live dependency health checks
         uses: ./.github/actions/run_with_e2e_account
         with: