the StartListening call here is unnecessary because OSectionView
inherits from SdrMarkView which calls StartListening unconditionally in
it's constructor.

Change-Id: I0191fce12e0600cc8fc6b9cc20e7e3bf39b386d3
Reviewed-on: https://gerrit.libreoffice.org/43070Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>