diff --git a/example/iot-gateway/node_modules/callsite/Readme.md b/example/iot-gateway/node_modules/callsite/Readme.md
+++ /dev/null
@@ -1,44 +0,0 @@
-# callstack
-
- Access to v8's "raw" `CallSite`s.
-
-## Installation
-
- $ npm install callsite
-
-## Example
-
-```js
-var stack = require('callsite');
-
-foo();
-
-function foo() {
- bar();
-}
-
-function bar() {
- baz();
-}
-
-function baz() {
- console.log();
- stack().forEach(function(site){
- console.log(' \033[36m%s\033[90m in %s:%d\033[0m'
- , site.getFunctionName() || 'anonymous'
- , site.getFileName()
- , site.getLineNumber());
- });
- console.log();
-}
-```
-
-## Why?
-
- Because you can do weird, stupid, clever, wacky things such as:
-
- - [better-assert](https://github.com/visionmedia/better-assert)
-
-## License
-
- MIT