Remove incorrect change log item (#15552)
Related to #6245 and #15519
Summary of the issue:
Change log contains an incorrect item
Fixed performance issues with Task Manager and some Windows versions. (#6245)
Indeed #6245. It had been erroneously closed as duplicate of #15519 before being reopened again. Indeed, #15519 is about tagging the task list as bad UIA window, whereas #6245 was already an issue before trying to consider the task list as good UIA window.
Description of user facing changes
Remove the incorrect log entry
