Whilst we are about it, need to expand the macro
SFX_DECL_XSERVICEINFO_NOFACTORY and remove the impl_createInstance
function. Also removed factory parameter from constructor as not
needed.

Change-Id: I400274fa9aaaa95be1c9929bce9dd6f25c780196
Signed-off-by: Stephan Bergmann <sbergman@redhat.com>