fix linting errors

lib/6to5/register.js

@@ -1,6 +1,8 @@
 var maps = {};
 var old  = require.extensions[".js"];
 
+// TODO: source maps - Error.prepareStackTrace override
+
 require.extensions[".js"] = function (m, filename) {
   if (filename.indexOf("node_modules") >= 0) {
     return old.apply(this, arguments);
@@ -10,7 +12,7 @@ require.extensions[".js"] = function (m, filename) {
     sourceMapObject: true
   });
 
-  maps[flename] = result.map;
+  //maps[filename] = result.map;
 
   m._compile(result.code, filename);
 };

lib/6to5/transform.js

@@ -77,7 +77,7 @@ transform._runTransformer = function (transformer, tree, opts, generateUid) {
   });
 };
 
-transform.test = function (actual, expect, opts, debug) {
+transform.test = function (actual, expect, opts) {
   opts = opts || {};
   _.defaults(opts, { filename: "test" });
 

lib/6to5/traverse/index.js

@@ -56,7 +56,7 @@ traverse.hasType = function (tree, type, blacklistTypes) {
   if (tree.type === type) return true;
 
   var has = false;
-  blacklistTypes = blacklistTypes || []
+  blacklistTypes = blacklistTypes || [];
 
   if (_.isArray(tree)) {
     return !!_.find(tree, function (node) {