[TASK] Remove unused option listModulePath

The option listModulePath set for the TYPO3 Backend is
never used, nor is the path valid anymore since TYPO3 v7,
and can be removed.

Resolves: #72495
Releases: master, 7.6
Change-Id: I6c699fb08194ce069cfac19f6f39c1ebf59aab70
Reviewed-on: https://review.typo3.org/45529


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>