Clean up messages.ignore after doclava removal
Clean up messages.ignore after doclava removal

Change-Id: I6dbc5deeda9f9f03d18010f42e1be36e82f1666d
Test: manual
Bug: 169886590

AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx