Remove TODO to upgrade felix.log.
Remove TODO to upgrade felix.log.

- The new api looks less convenient, and the gain from upgrading is unclear.

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa