diff --git a/scripts/error-codes/gulp-extract-errors.js b/scripts/error-codes/gulp-extract-errors.js
deleted file mode 100644
index cc873db9d4..0000000000
--- a/scripts/error-codes/gulp-extract-errors.js
+++ /dev/null
@@ -1,117 +0,0 @@
-/**
- * Copyright (c) 2013-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-'use strict';
-
-var babylon = require('babylon');
-var fs = require('fs');
-var gutil = require('gulp-util');
-var path = require('path');
-var through = require('through2');
-var traverse = require('babel-traverse').default;
-
-var evalToString = require('./evalToString');
-var invertObject = require('./invertObject');
-
-var PLUGIN_NAME = 'extract-errors';
-
-var babylonOptions = {
-  sourceType: 'module',
-  // As a parser, babylon has its own options and we can't directly
-  // import/require a babel preset. It should be kept **the same** as
-  // the `babel-plugin-syntax-*` ones specified in
-  // https://github.com/facebook/fbjs/blob/master/babel-preset/configure.js
-  plugins: [
-    'classProperties',
-    'flow',
-    'jsx',
-    'trailingFunctionCommas',
-    'objectRestSpread',
-  ],
-};
-
-module.exports = function(opts) {
-  if (!opts || !('errorMapFilePath' in opts)) {
-    throw new gutil.PluginError(
-      PLUGIN_NAME,
-      'Missing options. Ensure you pass an object with `errorMapFilePath`.'
-    );
-  }
-
-  var errorMapFilePath = opts.errorMapFilePath;
-  var existingErrorMap;
-  try {
-    existingErrorMap = require(
-      path.join(__dirname, path.basename(errorMapFilePath))
-    );
-  } catch (e) {
-    existingErrorMap = {};
-  }
-
-  var allErrorIDs = Object.keys(existingErrorMap);
-  var currentID;
-
-  if (allErrorIDs.length === 0) { // Map is empty
-    currentID = 0;
-  } else {
-    currentID = Math.max.apply(null, allErrorIDs) + 1;
-  }
-
-  // Here we invert the map object in memory for faster error code lookup
-  existingErrorMap = invertObject(existingErrorMap);
-
-  function transform(file, enc, cb) {
-    if (file.isNull()) {
-      cb(null, file);
-      return;
-    }
-
-    if (file.isStream()) {
-      cb(new gutil.PluginError(PLUGIN_NAME, 'Streaming not supported'));
-      return;
-    }
-
-    var source = file.contents.toString();
-    var ast = babylon.parse(source, babylonOptions);
-
-    traverse(ast, {
-      CallExpression: {
-        exit: function(astPath) {
-          if (astPath.get('callee').isIdentifier({name: 'invariant'})) {
-            var node = astPath.node;
-
-            // error messages can be concatenated (`+`) at runtime, so here's a
-            // trivial partial evaluator that interprets the literal value
-            var errorMsgLiteral = evalToString(node.arguments[1]);
-            if (existingErrorMap.hasOwnProperty(errorMsgLiteral)) {
-              return;
-            }
-
-            existingErrorMap[errorMsgLiteral] = '' + (currentID++);
-          }
-        },
-      },
-    });
-
-    cb();
-  }
-
-  function flush(cb) {
-    fs.writeFile(
-      errorMapFilePath,
-      JSON.stringify(invertObject(existingErrorMap), null, 2) + '\n',
-      'utf-8',
-      function() {
-        // avoid calling cb with fs.write callback data
-        cb();
-      }
-    );
-  }
-
-  return through.obj(transform, flush);
-};