[TASK] Don't simulate TSFE for CropViewHelper

The cObject cropping functionality was reworked quite a lot
and does not depend on TSFE anymore, so the code to simulate
TSFE object for backend requests can be removed.

Resolves: #77772
Releases: master
Change-Id: I7481e159658828be1672080590cbe98d2b3c5aa0
Reviewed-on: https://review.typo3.org/49742


Reviewed-by: Claus Due <claus@phpmind.net>
Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Jigal van Hemert <jigal.van.hemert@typo3.org>
Tested-by: Jigal van Hemert <jigal.van.hemert@typo3.org>