diff --git a/example/iot-gateway/node_modules/bytebuffer/externs/minimal-env.js b/example/iot-gateway/node_modules/bytebuffer/externs/minimal-env.js
+++ /dev/null
@@ -1,52 +0,0 @@
-/**
- * @param {string} moduleName
- * @returns {?}
- */
-function require(moduleName) {};
-
-/**
- * @param {string} name
- * @param {Array.<string>} deps
- * @param {function(...[*])} f
- */
-function define(name, deps, f) {};
-
-/**
- * @param {number} size
- * @constructor
- * @extends Array
- */
-function Buffer(size) {};
-
-/**
- * @param {*} buf
- * @return {boolean}
- */
-Buffer.isBuffer = function(buf) {};
-
-/**
- * @type {Object.<string,*>}
- */
-var console = {};
-
-/**
- * @param {string} s
- */
-console.log = function(s) {};
-
-/**
- * @type {*}
- */
-var module = {};
-
-/**
- * @param {...*} var_args
- * @returns {string}
- */
-String.fromCodePoint = function(var_args) {};
-
-/**
- * @param {number} offset
- * @returns {number}
- */
-String.prototype.codePointAt = function(offset) {};