diff --git a/gulpfile.js b/gulpfile.js
index bba62cc5a8..e056c5cbdb 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -25,7 +25,6 @@ var pubbuild = require('./tools/build/pubbuild');
 var dartanalyzer = require('./tools/build/dartanalyzer');
 var jsserve = require('./tools/build/jsserve');
 var pubserve = require('./tools/build/pubserve');
-var file2moduleName = require('./tools/build/file2modulename');
 var karma = require('karma');
 var minimist = require('minimist');
 var runServerDartTests = require('./tools/build/run_server_dart_tests');
diff --git a/karma-dart.conf.js b/karma-dart.conf.js
index edc4ee1a62..a9c5928246 100644
--- a/karma-dart.conf.js
+++ b/karma-dart.conf.js
@@ -1,7 +1,5 @@
 // Karma configuration
 // Generated on Thu Sep 25 2014 11:52:02 GMT-0700 (PDT)
-var file2moduleName = require('./tools/build/file2modulename');
-
 module.exports = function(config) {
   config.set({
 
diff --git a/karma-js.conf.js b/karma-js.conf.js
index 2dea094ef2..b94f672cfc 100644
--- a/karma-js.conf.js
+++ b/karma-js.conf.js
@@ -1,7 +1,5 @@
 // Karma configuration
 // Generated on Thu Sep 25 2014 11:52:02 GMT-0700 (PDT)
-var file2moduleName = require('./tools/build/file2modulename');
-
 module.exports = function(config) {
   config.set({