SfxPoolItem has a copy constructor and its copy assignment
operator is deleted. Derived classes have a implicit defined
copy constructor too, if all members are copy constructible.

This patch removes default able copy constructors on such items.

Note: clang-tidy only finds functions defined in source, inlined
functions in headers are picked manualy.

Change-Id: I7e642a2ecf139420c53f6fcb39208918dd1a8d52
Reviewed-on: https://gerrit.libreoffice.org/43003Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>