Create a REST handler and any other necessary associated code (extension.json entry, helper classes, etc.) for the `DELETE lists/{id}/entries` endpoint.
[] endpoint implemented
[] tests created
[] tests pass
**Endpoint summary:**
Delete a list entry.
**Endpoint description:**
Deletes a given list entry.
The list must belong to the current user and the request must be authenticated with a MediaWiki session cookie.
Stability: [unstable](https://www.mediawiki.org/wiki/API_versioning#Unstable)
**Associated RESTBase code**
[[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/services/restbase/+/d544e9da48b9c79afb2338b7bab6960a94db6c61/v1/lists.yaml#608 | lists.yaml ]] (spec+forwarding)
[[ https://gerrit.wikimedia.org/g/mediawiki/services/restbase/+/d544e9da48b9c79afb2338b7bab6960a94db6c61/test/features/lists.js#840 | lists.js ]] (tests)
**Associated Action API code**
[[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/ReadingLists/+/refs/heads/master/src/Api/ApiReadingListsDeleteEntry.php#12 | ApiReadingListsDeleteEntry ]]
[[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/ReadingLists/+/refs/heads/master/tests/phpunit/Api/ApiReadingListsDeleteEntryTest.php#16 | ApiReadingListsDeleteEntryTest ]]
Further details to be added.