[!!!][TASK] Remove jsfunc.evalfield.js

The file `jsfunc.evalfield.js` responsible for form value evaluation and
validation has been removed. This job is now done by
`TYPO3/CMS/Backend/FormEngineValidation` since TYPO3 7.4.

Resolves: #88427
Releases: master
Change-Id: Ib366ccbc5795b9c428743f52098c0a6fbca47735
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60792


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>