Revert "Trigger performance CI run to demonstrate error"

This reverts commit 34d5eca.

Author: andrewheard

.github/workflows/performance.yml

@@ -145,7 +145,6 @@ jobs:
           path: .build
           key: ${{ steps.generate_cache_key.outputs.cache_key }}
   spm:
-    # TODO: Remove before merging; triggering CI run.
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     needs: [spm-package-resolved]