replace the old declare and don't implement pattern
with C++11 delete keyword.
remove obsolete default ctor declarations.

Change-Id: I90cce42445e3b0558dc9b6e0f9cd2a27359e5d9e
Reviewed-on: https://gerrit.libreoffice.org/25411Tested-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>
Reviewed-by: Michael Stahl <mstahl@redhat.com>