[CLEANUP] Fix class alias maps and IDE files

With moving code around the class alias maps placed in compatibility6
and mediace got a little messed up. Move the aliases to the correct place
and remove stale aliases.

Resolves: #69946
Releases: master
Change-Id: Ifec476b6e6135ad8b6640c34ec54d8118201e6f5
Reviewed-on: http://review.typo3.org/43422


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>