Its purpose was to allow incrementally migrate all callers of
SdrModel::libreOfficeKitCallback() to use
SfxViewShell::libreOfficeKitViewCallback() (which allows notifying only
the currently active or all views) instead. That is done by now, so it
can go.

Change-Id: I521bbbe5c638dfd844ebf025153459a37362d3c3
Reviewed-on: https://gerrit.libreoffice.org/26413Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>