[!!!][CLEANUP] Remove ancient template selection hack feature

Resolves: #63056
Releases: master
Change-Id: I26454e664f2d394cd13d0dee283ef6cba025b5b2
Reviewed-on: http://review.typo3.org/34318
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>