[TASK] Remove "require_once" in /typo3/

During the namespace switch many classes were renamed
and moved to different locations based on the new names.

This patch removes the "require_once" statements that are
automatically resolved and auto loaded in makeInstance.

Change-Id: I5f788fad6ea63b2aa0b9f33e3d068b93ec04dc31
Resolves: #48934
Releases: 6.2
Reviewed-on: https://review.typo3.org/21283
Reviewed-by: Philipp Gampe
Reviewed-by: Wouter Wolters
Reviewed-by: Susanne Moog
Tested-by: Susanne Moog
Reviewed-by: Oliver Klee
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn