Found with bin/find-unneeded-includes
Only removal proposals are dealt with here.
New IWYU and recent developments in f-u-i helped to identify
some non self contained files, those were fixed too.
Change-Id: I527f7c2cf2660a758b13eabb4c444ff79ae35f8c
Reviewed-on: https://gerrit.libreoffice.org/75186
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>