chore: remove changelog entry of reverted pr

Author: plun1331

CHANGELOG.md

@@ -82,8 +82,6 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#2063](https://github.com/Pycord-Development/pycord/pull/2063))
 - `default_avatar` behavior changes depending on the user's username migration status.
   ([#2087](https://github.com/Pycord-Development/pycord/pull/2087))
-- `Client.on_error()` now has an `exception` parameter for easier error handling.
-  ([#1945](https://github.com/Pycord-Development/pycord/pull/1945))
 - Typehinted `command_prefix` and `help_command` arguments properly.
   ([#2099](https://github.com/Pycord-Development/pycord/pull/2099))