Certain differences are still needed, since ICU appears to support Emoji 4.0 only, while we need Emoji 5.0. But the bulk of the data is now carried by ICU. We no longer need the script that generates the tables, so that's also removed. Test: Comprehensive unit tests added. Bug: 27365282 Bug: 30874706 Change-Id: I011443fbca9bb202deff7fffb40043f89e1f1fb1