[2098] cleanup: removed commented-out unused method parameter.

src/lib/datasrc/memory/treenode_rrset.cc

@@ -195,7 +195,7 @@ TreeNodeRRset::toWire(AbstractMessageRenderer& renderer) const {
 }
 
 unsigned int
-TreeNodeRRset::toWire(isc::util::OutputBuffer& /*buffer*/) const {
+TreeNodeRRset::toWire(isc::util::OutputBuffer&) const {
     isc_throw(Unexpected, "unexpected method called on TreeNodeRRset");
 }