diff --git a/example/iot-gateway/node_modules/mime/build/build.js b/example/iot-gateway/node_modules/mime/build/build.js
+++ /dev/null
@@ -1,11 +0,0 @@
-var db = require('mime-db');
-
-var mapByType = {};
-Object.keys(db).forEach(function(key) {
- var extensions = db[key].extensions;
- if (extensions) {
- mapByType[key] = extensions;
- }
-});
-
-console.log(JSON.stringify(mapByType));