===Description
There is a partial migration of the *UIActions instrument to the MP client library. It uses `dispatch()`, which is now deprecated in favour of `submitInteraction()`. We (Data Products) are currently discussing collaborating with the owners of the instrument, Web, who have signalled that they want it to be stable while they establish new baseline metrics for an upcoming project.
We should remove the partial migration of the instrument to minimise our own maintenance burden but, right now, not attempt to update the instrument to use `submitInteractionEvent()`.
====Acceptance criteria
[x] The partial migration is removed
** See https://gerrit.wikimedia.org/g/mediawiki/extensions/WikimediaEvents/+/b4d53a6eedece5e5aad84705c40d947e01e0ef85/modules/ext.wikimediaEvents/desktopWebUIActions.js#111 and https://gerrit.wikimedia.org/g/mediawiki/extensions/WikimediaEvents/+/b4d53a6eedece5e5aad84705c40d947e01e0ef85/modules/ext.wikimediaEvents/mobileWebUIActions.js#78
[x] Any supporting documentation is updated
** e.g. see the `WikimediaEvents/OWNERS.md` file and/or the DocBlocks at the tops of the files listed above
===Completion checklist
<To be filled in by assignee>
[] Regression tests covering this?
[] Documentation updated and conforms to [[https://www.mediawiki.org/wiki/Accessibility_guide_for_developers |the accessiblity guide]]?
[] ...