Drop ValueSet forward declarations from headers
not actually using the class.
Forward-declare the class in cui/source/inc/numpages.hxx
which actually uses it, but didn't forward-declare it
or include the header yet, but previously got the forward-declaration
from an included header.
Change-Id: I8876ad47eb362f581aa41ee4a61a85c4093a1dd0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/211881
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins
Michael Weghorn
e68422786a