refactor: remove debug log in world state sync (#2613)

Remove extra debug log.
 
# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [x] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [x] Every change is related to the PR description.
- [x] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

yarn-project/world-state/src/synchronizer/server_world_state_synchronizer.ts

@@ -218,7 +218,6 @@ export class ServerWorldStateSynchronizer implements WorldStateSynchronizer {
     const encoded = Buffer.from(hex.length % 2 === 1 ? '0' + hex : hex, 'hex');
 
     await this.db.put(DB_KEY_BLOCK_NUMBER, encoded);
-    this.log.debug(`Committed current L2 block number ${this.currentL2BlockNum} to db`);
   }
 
   private async restoreCurrentL2BlockNumber() {