remove require buffer

Author: ndmanvar

lib/transports.js

@@ -7,8 +7,6 @@ var timeoutReq = require('timed-out');
 var http = require('http');
 var https = require('https');
 var tunnel = require('tunnel-agent');
-var Buffer = require("safe-buffer").Buffer;
-
 var agentOptions = {
   keepAlive: true,
   maxSockets: 100