diff --git a/simpleRequire.js b/simpleRequire.js
deleted file mode 100644
index b6f81fb..0000000
--- a/simpleRequire.js
+++ /dev/null
@@ -1,221 +0,0 @@
-(function (global) {
-    if (typeof __VRT_INIT__ !== 'undefined') {
-        // In the visual regression test environment.
-        __VRT_INIT__();
-
-        var vstRunContextStr = localStorage.getItem('vstRunContext');
-        if (vstRunContextStr) {
-            window.__VRT_RUN_CONTEXT__ = JSON.parse(vstRunContextStr);
-            localStorage.removeItem('vstRunContext');
-        }
-        else {
-            localStorage.clear();
-        }
-    }
-    var requireCfg = { paths: {} }
-
-    var currentDefinedFactory;
-    var currentDefinedDeps;
-    var exportsPlaceholder = {};
-
-    var ALLOWED_EXTS = [
-        'gexf', 'txt', 'csv', 'svg',    // text
-        'js', 'json'
-    ];
-
-    // Promise to get modules exports.
-    var mods = {};
-
-    function handleLoadError(url, resolve, reject) {
-        var errMsg = 'require: failed to load ' + url;
-        if (typeof __VRT_LOAD_ERROR__ !== 'undefined') {
-            // Not block the visual regression testing.
-            __VRT_LOAD_ERROR__(errMsg);
-            resolve();
-        }
-        else {
-            reject(errMsg);
-        }
-    }
-    function loadText(url) {
-        return new Promise(function (resolve, reject) {
-            var xhr = new XMLHttpRequest();
-            xhr.onload = function (e) {
-                if (xhr.status === 200) {
-                    resolve(xhr.responseText);
-                }
-                else {
-                    handleLoadError(url, resolve, reject);
-                }
-            }
-            xhr.onerror = function (e) {
-                handleLoadError(url, resolve, reject);
-            }
-            xhr.open('GET', url);
-            xhr.send();
-        });
-    }
-
-    function loadJSON(url) {
-        return loadText(url).then(function (text) {
-            return JSON.parse(text);
-        });
-    }
-    function loadScript(url) {
-        return new Promise(function (resolve, reject) {
-            var script = document.createElement('script');
-            script.async = true;
-            script.onload = function () {
-                resolve();
-            }
-            script.onerror = function () {
-                handleLoadError(url, resolve, reject);
-            }
-            script.src = url;
-            document.head.appendChild(script);
-        });
-    }
-    function resolvePath(p) {
-        var paths = requireCfg.paths || {};
-
-        for (var key in paths) {
-            if (paths.hasOwnProperty(key)) {
-                if (p.indexOf(key) === 0) {
-                    p = p.replace(key, paths[key]);
-                    break;
-                }
-            }
-        }
-
-        var ext = getExt(p);
-        if (ALLOWED_EXTS.indexOf(ext) < 0) {
-            p = p + '.js';
-        }
-        return p;
-    }
-    function getExt(str) {
-        return str.split('.').pop();
-    }
-    function invokeFactory(factory, depsPromise) {
-        if (typeof factory === 'function') {
-            return depsPromise.then(function (deps) {
-                var modExports = {};
-                var factoryRet = factory.apply(null, deps.map(function (dep) {
-                    return dep === exportsPlaceholder ? modExports : dep;
-                }));
-                return factoryRet || modExports;
-            });
-        }
-        else {
-            // define(JSONObject)
-            return factory;
-        }
-    }
-    function define(modId, depsIds, factory) {
-        if (factory == null) {
-            // define(function () {});
-            if (depsIds == null) {
-                factory = modId;
-                modId = null;
-            }
-            else {
-                factory = depsIds;
-                depsIds = null;
-                // define(['depsId'], function () {});
-                if (modId instanceof Array) {
-                    depsIds = modId;
-                    modId = null;
-                }
-            }
-        }
-        if (modId) {
-            mods[modId] = invokeFactory(factory, loadDeps(depsIds));
-        }
-        else {
-            currentDefinedFactory = factory;
-            currentDefinedDeps = loadDeps(depsIds || []);
-        }
-    }
-    function loadMod(modId) {
-        if (!mods[modId]) {
-            mods[modId] = {};
-
-            function loaded(exports) {
-                var ret;
-                if (currentDefinedDeps) {
-                    ret = invokeFactory(currentDefinedFactory, currentDefinedDeps);
-                }
-                else {
-                    ret = exports;
-                }
-                currentDefinedFactory = null;
-                currentDefinedDeps = null;
-                return ret;
-            }
-
-            var url = resolvePath(modId);
-            var ext = getExt(url);
-            if (ext === 'js') {
-                mods[modId].exports = loadScript(url).then(loaded);
-            }
-            else if (ext === 'json' || ext === 'geojson') {
-                mods[modId].exports = loadJSON(url).then(loaded);
-            }
-            else {
-                mods[modId].exports = loadText(url).then(loaded);
-            }
-        }
-        return mods[modId].exports;
-    }
-
-    function loadDeps(depsIds) {
-        return Promise.all(depsIds.map(function (depId) {
-            if (depId === 'exports') {
-                return Promise.resolve(exportsPlaceholder);
-            }
-            else {
-                return loadMod(depId);
-            }
-        }));
-    }
-
-    var pendingRequireCallbacks = [];
-    var pendingRequireCallbackParams = [];
-    var requireCount = 0;
-    function require(depsIds, cb) {
-        if (typeof depsIds === 'string') {
-            depsIds = [depsIds];
-        }
-        var cbIdx = requireCount;
-        pendingRequireCallbacks.push(cb);
-        requireCount++;
-
-        loadDeps(depsIds).then(function (deps) {
-            pendingRequireCallbackParams[cbIdx] = deps;
-            requireCount--;
-
-            if (requireCount === 0) {   // Flush
-                var requireCallbackToFlush = pendingRequireCallbacks;
-                var requireCallbackParamsToFlush = pendingRequireCallbackParams;
-                // Clear before flush. Avoid more require in the callback.
-                pendingRequireCallbacks = [];
-                pendingRequireCallbackParams = [];
-
-                // Start visual regression test before callback
-                if (typeof __VRT_START__ !== 'undefined') {
-                    __VRT_START__();
-                }
-
-                for (var i = 0; i < requireCallbackToFlush.length; i++) {
-                    requireCallbackToFlush[i] && requireCallbackToFlush[i].apply(null, requireCallbackParamsToFlush[i]);
-                }
-            }
-        });
-    }
-    require.config = function (cfg) {
-        requireCfg = cfg || {};
-    }
-    global.require = require;
-    global.define = define;
-    global.define.amd = {};
-})(window);