diff --git a/lib/6to5/transformation/transformers/destructuring.js b/lib/6to5/transformation/transformers/destructuring.js
index 31144582a2..0ce4bd0056 100644
--- a/lib/6to5/transformation/transformers/destructuring.js
+++ b/lib/6to5/transformation/transformers/destructuring.js
@@ -1,6 +1,5 @@
-var util = require("../../util");
-var t    = require("../../types");
-var _    = require("lodash");
+var t = require("../../types");
+var _ = require("lodash");
 
 var buildVariableAssign = function (kind, id, init) {
   if (kind === false) {
diff --git a/lib/6to5/transformation/transformers/generator-comprehension.js b/lib/6to5/transformation/transformers/generator-comprehension.js
index 6a6f80f751..765a0cdb94 100644
--- a/lib/6to5/transformation/transformers/generator-comprehension.js
+++ b/lib/6to5/transformation/transformers/generator-comprehension.js
@@ -1,7 +1,7 @@
 var arrayComprehension = require("./array-comprehension");
 var t                  = require("../../types");
 
-exports.ComprehensionExpression = function (node, parent, file) {
+exports.ComprehensionExpression = function (node) {
   if (!node.generator) return;
 
   var body = [];
diff --git a/lib/6to5/transformation/transformers/spread.js b/lib/6to5/transformation/transformers/spread.js
index 8d9cce258e..f54a3a417b 100644
--- a/lib/6to5/transformation/transformers/spread.js
+++ b/lib/6to5/transformation/transformers/spread.js
@@ -1,6 +1,5 @@
-var util = require("../../util");
-var t    = require("../../types");
-var _    = require("lodash");
+var t = require("../../types");
+var _ = require("lodash");
 
 var getSpreadLiteral = function (spread, file) {
   return file.toArray(spread.argument);