Also drop unused framework/inc/fwkdllapi.h
Found with bin/find-unneeded-includes
Only removal proposals are dealt with here.
Change-Id: I9e79266f273b778f4a8bd3330b1b0353a2e01a61
Reviewed-on: https://gerrit.libreoffice.org/81927
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>