[BUGFIX] Fix deprecation message of two GeneralUtility methods

We're only deprecating these two methods, not the whole file.

Resolves: #80316
Releases: master
Change-Id: Ia1727c0996f53caa35d4755d2d5caa04bc48de46
Reviewed-on: https://review.typo3.org/52071


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>