[!!!][TASK] Remove deprecated file type FILETYPE_SOFTWARE

Resolves: #61859
Releases: master
Change-Id: I30360e021faa8f252a11a7aad6247aedbbc175ca
Reviewed-on: http://review.typo3.org/32955
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>