conf: Remove the unrelated comment

Pushed under trivial rule.

src/conf/domain_conf.c

@@ -10561,7 +10561,6 @@ virDomainDefParseXML(xmlDocPtr xml,
     }
     VIR_FREE(nodes);
 
-    /* Extract numatune if exists. */
     if ((n = virXPathNodeSet("./resource", ctxt, &nodes)) < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        "%s", _("cannot extract resource nodes"));