revert c74f28caa7

revert one

node_modules/mongodb/etc/prepare.js

@@ -1,12 +0,0 @@
-#! /usr/bin/env node
-var cp = require('child_process');
-var fs = require('fs');
-var os = require('os');
-
-if (fs.existsSync('src')) {
-  cp.spawn('npm', ['run', 'build:dts'], { stdio: 'inherit', shell: os.platform() === 'win32' });
-} else {
-  if (!fs.existsSync('lib')) {
-    console.warn('MongoDB: No compiled javascript present, the driver is not installed correctly.');
-  }
-}