diff --git a/lib/6to5/transformation/transformers/es6/tail-call.js b/lib/6to5/transformation/transformers/es6/tail-call.js
index 6d061bcf11..e18b8c319a 100644
--- a/lib/6to5/transformation/transformers/es6/tail-call.js
+++ b/lib/6to5/transformation/transformers/es6/tail-call.js
@@ -2,10 +2,6 @@
 
 var t    = require("../../../types");
 
-function returnBlock(expr) {
-  return t.blockStatement([t.returnStatement(expr)]);
-}
-
 function transformExpression(node, scope, state) {
   if (!node) return;