diff --git a/src/shared/util.js b/src/shared/util.js
index 91bf03d8c..dc7b00a1e 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -933,24 +933,6 @@ function isPDFFunction(v) {
   return fnDict.has('FunctionType');
 }
 
-/**
- * Legacy support for PDFJS Promise implementation.
- * TODO remove eventually
- * @ignore
- */
-var LegacyPromise = PDFJS.LegacyPromise = (function LegacyPromiseClosure() {
-  return function LegacyPromise() {
-    var resolve, reject;
-    var promise = new Promise(function (resolve_, reject_) {
-      resolve = resolve_;
-      reject = reject_;
-    });
-    promise.resolve = resolve;
-    promise.reject = reject;
-    return promise;
-  };
-})();
-
 /**
  * Promise Capability object.
  *