Remove unused code.

Author: davidlehn

lib/nodeMap.js

@@ -190,9 +190,6 @@ api.createNodeMap = (input, graphs, graph, issuer, name, list) => {
           {propertyIsArray: true, allowDuplicate: false});
         api.createNodeMap(o, graphs, graph, issuer, id);
       } else if(graphTypes.isValue(o)) {
-        //if('@type' in o) {
-        //  o['@type'] = o['@type'][0];
-        //}
         util.addValue(
           subject, property, o,
           {propertyIsArray: true, allowDuplicate: false});