[FOLLOWUP][TASK] Deprecate GeneralUtility:readLLfile

ExtensionManager fatals since the parserFactory object is
not always instantiated as expected.

Resolves: #68122
Releases: master
Change-Id: Ibc1ad2ac4df76b80b529c45ab5c1bf83115abf69
Reviewed-on: http://review.typo3.org/41240


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>