Remove API XML files from libvirt RPM

The API XML files are now formally installed as part of the
libvirt-devel RPM. Thus there is no need to include them as
%doc in the main libvirt RPM

libvirt.spec.in

@@ -1185,8 +1185,6 @@ rm -f $RPM_BUILD_ROOT%{_sysconfdir}/sysctl.d/libvirtd
 %attr(0755, root, root) %{_sbindir}/libvirtd
 
 %{_mandir}/man8/libvirtd.8*
-
-%doc docs/*.xml
 %endif
 
 %files docs