Revert "[BUGFIX] Serialize expression in switch viewhelper"

This reverts commit 197a810b6a7db41717f30c0d8101c3e0181690fc.

The proposed solution of serialzing the expression was post merge rejected by the strategy team.
The issue will be set to new and a more elegant solution
is wanted for this. Sorry guys and thanks for all the effort

Change-Id: Ie9c97546934c995183552143bca29934a9611f93
Releases: master, 6.2
Reviewed-on: http://review.typo3.org/35437
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>