[TASK] Cleanup CSH calls

Due to a BackendUtility cleanup
there were some methods related to help
texts that were broken and unstructured.

Additionally, some methods are deprecated
for removal as they haven't been used since
TYPO3 CMS 4.5.

Resolves: #62864
Releases: master
Change-Id: I3e51e25d74b282aa698df493fa4f87a54d87f823
Reviewed-on: http://review.typo3.org/33987
Reviewed-by: Christian Buelter <buelter@kennziffer.com>
Tested-by: Christian Buelter <buelter@kennziffer.com>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>