[1807] removed unnecessary comment

src/lib/datasrc/memory_datasrc.cc

@@ -436,8 +436,6 @@ ZoneData::findNode(const Name& name, RBTreeNodeChain<Domain>& node_path,
         if (node_path.getLastComparisonResult().getRelation() ==
             NameComparisonResult::SUPERDOMAIN) { // empty node, so NXRRSET
             LOG_DEBUG(logger, DBG_TRACE_DATA, DATASRC_MEM_SUPER_STOP).arg(name);
-            // getClosestNSEC returns empty node for non-NSEC zones or if
-            // option FIND_DNSSEC is not set, so no need to check here
             return (ResultType(ZoneFinder::NXRRSET, node,
                                getClosestNSEC(node_path, options)));
         }