defaultJSExtension removal is unnecessary as wont duplicate

lib/utils.js

@@ -45,22 +45,6 @@ function getCanonicalName(loader, normalized) {
     normalized = normalized.substr(0, pluginIndex);
   }
 
-  // defaultJSExtensions handling
-  if (loader.defaultJSExtensions && normalized.split('/').pop().split('.').pop() == 'js') {
-    // if we're in a package that disables defaultJSExtensions, leave as-is
-    var isDefaultExtensionPackage = false;
-    for (var p in loader.packages) {
-      if (normalized.substr(0, p.length) == p && (normalized.length == p.length || normalized[p.length] == '/')) {
-        if ('defaultExtension' in loader.packages[p])
-          isDefaultExtensionPackage = true;
-      }
-    }
-
-    // remove defaultJSExtension
-    if (!isDefaultExtensionPackage)
-      normalized = normalized.substr(0, normalized.length - 3);
-  }
-
   // now just reverse apply paths rules to get canonical name
   var pathMatch, pathMatchLength = 0;
   var curMatchlength;