diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
deleted file mode 100644
index 3a62201c..00000000
--- a/src/arrayMethodJoin.js
+++ /dev/null
@@ -1,12 +0,0 @@
-'use strict';
-
-/**
- * Implement method join
- */
-function applyCustomJoin() {
-  [].__proto__.join2 = function(separator) {
-    // write code here
-  };
-}
-
-module.exports = applyCustomJoin;