Add changelog entry for #6578 [ci skip]

Author: OTP Changelog Bot

doc/user/Changelog.md

@@ -19,6 +19,7 @@ based on merged pull requests. Search GitHub issues and pull requests for smalle
 - Revert arrivalStoptime, departureStoptime and stoptimesForDate behavior changes from #6245 [#6554](https://github.com/opentripplanner/OpenTripPlanner/pull/6554)
 - Filter flex trips by agency and route [#6421](https://github.com/opentripplanner/OpenTripPlanner/pull/6421)
 - Fix crash on itineraries with frequencies where distanceMeters was not computed [#6580](https://github.com/opentripplanner/OpenTripPlanner/pull/6580)
+- Remove REST API [#6578](https://github.com/opentripplanner/OpenTripPlanner/pull/6578)
 [](AUTOMATIC_CHANGELOG_PLACEHOLDER_DO_NOT_REMOVE)
 
 ## 2.7.0 (2025-03-12)