Revert "Fix port detection lag on OS X with Firewall enabled (#319)"

The problem has since been fixed upstream.

This reverts commit f7011e0.

package.json

@@ -44,6 +44,7 @@
     "chalk": "1.1.3",
     "cross-spawn": "4.0.0",
     "css-loader": "0.23.1",
+    "detect-port": "0.1.4",
     "eslint": "3.1.1",
     "eslint-loader": "1.4.1",
     "eslint-plugin-flowtype": "2.4.0",

scripts/eject.js

@@ -40,7 +40,6 @@ prompt(
     path.join('scripts', 'build.js'),
     path.join('scripts', 'start.js'),
     path.join('scripts', 'utils', 'chrome.applescript'),
-    path.join('scripts', 'utils', 'detectPort.js'),
     path.join('scripts', 'utils', 'prompt.js')
   ];
 

scripts/start.js

@@ -15,7 +15,7 @@ var webpack = require('webpack');
 var WebpackDevServer = require('webpack-dev-server');
 var execSync = require('child_process').execSync;
 var opn = require('opn');
-var detect = require('./utils/detectPort');
+var detect = require('detect-port');
 var prompt = require('./utils/prompt');
 var config = require('../config/webpack.config.dev');