Revert "[BUGFIX] Enable add markers in LoginController signal"

This reverts commit 5fbbb8b6

If no signal is registered, the original markers are lost. Needs rework.

Change-Id: Ib043b731af526de685c8d06927459ff069be14a9
Reviewed-on: https://review.typo3.org/24227
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring