[CLEANUP] Cleanup EXT:recycler

This patch solves normal cleanup tasks:

* Correcting phpDoc
* Adding missing phpDocs
* Using short classnames
* Removing unused variables and parameters

Releases: master
Resolves: #62698
Change-Id: I12409727c8839a9823bb5664d3cdcf6ee2c2133e
Reviewed-on: http://review.typo3.org/33904
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>