Reverts zed-industries/zed#52810

This seems to have broken CI, after this was merged every test run
failed with:

```
Summary [ 145.368s] 5753 tests run: 5750 passed, 3 failed, 20 skipped
        FAIL [   0.411s] (5476/5753) workspace persistence::tests::test_gc_preserves_current_and_last_sessions
        FAIL [   0.431s] (5477/5753) workspace persistence::tests::test_gc_deletes_empty_workspace_with_items
        FAIL [   0.452s] (5479/5753) workspace persistence::tests::test_gc_deletes_stale_outside_window
```

Release Notes:
- N/A