### Changes

* [#39](https://github.com/rubocop/rubocop-performance/pull/39): Remove `Performance/LstripRstrip` cop. ([@koic][])
* [#39](https://github.com/rubocop/rubocop-performance/pull/39): Remove `Performance/RedundantSortBy`, `Performance/UnneededSort` and `Performance/Sample` cops. ([@koic][])

[@koic]: https://github.com/koic
