Jiaming Yuan 1877cb8e83
Change default metric for gamma regression to deviance. (#9757)
* Change default metric for gamma regression to deviance.

- Cleanup the gamma implementation.
- Use deviance instead since the objective is derived from deviance.
2023-11-22 21:17:48 +08:00
..
2023-11-22 19:27:31 +08:00
2023-11-22 19:27:31 +08:00
2022-12-20 15:15:07 +08:00