which added at f6d61562.
But they seems unnecessay because, even without them,
soon the intrusive_ptr goes out of scope then its dtor
decrements refcount.

Change-Id: I6e35ecb7d5a0b5ccaef6ea9b7507300dcb589801
Reviewed-on: https://gerrit.libreoffice.org/24013Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Tardon <dtardon@redhat.com>