[BUGFIX] Remove the old Xclass code lines

Remove the old XClass code lines, that are not
used in TYPO3 CMS 6.2 anymore.

Change-Id: I42b182388e8f93493acde173fd37b5dae0a992ec
Reviewed-on: https://review.typo3.org/31031
Reviewed-by: Jo Hasenau
Tested-by: Jo Hasenau