[!!!][TASK] Remove wizard icons

The following icons are removed from EXT:backend/Resources/Public/Images/FormFieldWizard/:

- wizard_add.gif
- wizard_edit.gif
- wizard_list.gif
- wizard_table.gif

The TCA migration migrates it to the proper icon fonts.
For 7.6, the patch will be applied without removing the icons.

Resolves: #77630
Resolves: #77629
Releases: master, 7.6
Change-Id: I9e73fb6d1f7197d5c35309fa98093eeee44ccb02
Reviewed-on: https://review.typo3.org/49589


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>