From 5c575ebf8f3fc795218c05c0946cbc1f24362acc Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 14 Jan 2015 14:58:15 +1100
Subject: [PATCH] remove fast transformer backwards compatibility

---
 CHANGELOG.md     |  1 +
 lib/6to5/file.js | 11 -----------
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45a18036b1..6b0c9b5244 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ _Note: Gaps between patch versions are faulty/broken releases._
  * **Breaking Change**
   * `allowImportExportEverywhere` acorn option has been disabled for spec compliancy so imports and exports can **only** be present at the top level.
   * Caching is now always enabled for the require hook. It also now no longer caches require resolutions.
+  * Optional fast transformer backwards compatibility support has been removed. Use [loose mode](https://6to5.org/docs/usage/loose).
 
 ## 2.12.0
 
diff --git a/lib/6to5/file.js b/lib/6to5/file.js
index fa2967e3d2..5d561ac1a0 100644
--- a/lib/6to5/file.js
+++ b/lib/6to5/file.js
@@ -78,17 +78,6 @@ File.normaliseOptions = function (opts) {
   opts.optional  = util.arrayify(opts.optional);
   opts.loose     = util.arrayify(opts.loose);
 
-  // todo: remove in 3.0.0
-  _.each({
-    fastForOf: "forOf",
-    classesFastSuper: "classes"
-  }, function (newTransformer, oldTransformer) {
-    if (_.contains(opts.optional, oldTransformer)) {
-      _.pull(opts.optional, oldTransformer);
-      opts.loose.push(newTransformer);
-    }
-  });
-
   _.defaults(opts, {
     moduleRoot: opts.sourceRoot
   });