conf: snapshot: Drop unused variable 'creation'
conf: snapshot: Drop unused variable 'creation'

Signed-off-by: Yi Li <55e7333d41158bbb5c693ad611d1d73461adffca@winhong.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

jardasgit/libvirt,zippy2/libvirt,libvirt/libvirt,nertpinx/libvirt,jfehlig/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,zippy2/libvirt,jfehlig/libvirt,nertpinx/libvirt,crobinso/libvirt,nertpinx/libvirt,nertpinx/libvirt,jfehlig/libvirt,jfehlig/libvirt,olafhering/libvirt,crobinso/libvirt,olafhering/libvirt,jardasgit/libvirt,zippy2/libvirt,libvirt/libvirt,olafhering/libvirt,libvirt/libvirt,crobinso/libvirt,jardasgit/libvirt,jardasgit/libvirt,jardasgit/libvirt