[!!!][TASK] Move and remove icons of t3skin

Remove unused icons in t3skin and move icons to the correct extension.

Resolves: #77693
Releases: master
Change-Id: I56e38476a2237901c6e86990db6485403fc0f8c3
Reviewed-on: https://review.typo3.org/49652


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