Remove dead SourceMap code

Summary:
In several pervious diffs we have moved symbolication of JS stack traces
to the packeger. This lets us save a bunch of memory (~80MB) and CPU on device,
reduces dependency on JS after exception occured.

This diff cleans up a bunch of code that was used to do symbolication on client side.

Reviewed By: javache

Differential Revision: D3348676

fbshipit-source-id: 88baa5c502836c9ca892896e1ee5d83db37486d3

Libraries/JavaScriptAppEngine/Initialization/SourceMapsCache.js

@@ -1,44 +0,0 @@
-/**
- * Copyright (c) 2015-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.
- *
- * @providesModule SourceMapsCache
- */
-'use strict';
-
-const getObjectValues = require('getObjectValues');
-const SourceMapsUtils = require('SourceMapsUtils');
-
-const sourceMapsCache = {};
-
-const SourceMapsCache = {
-  mainSourceMapID: 'main',
-
-  fetch({text, url, fullSourceMappingURL}) {
-    const sourceMappingURL = fullSourceMappingURL
-      ? fullSourceMappingURL
-      : SourceMapsUtils.extractSourceMapURL({text, url});
-
-    sourceMapsCache[sourceMappingURL] = SourceMapsUtils.fetchSourceMap(
-      sourceMappingURL
-    );
-  },
-
-  getSourceMaps() {
-    fetchMainSourceMap();
-    return Promise.all(getObjectValues(sourceMapsCache));
-  },
-};
-
-function fetchMainSourceMap() {
-  if (!sourceMapsCache[SourceMapsCache.mainSourceMapID]) {
-    sourceMapsCache[SourceMapsCache.mainSourceMapID] =
-      SourceMapsUtils.fetchMainSourceMap();
-  }
-}
-
-module.exports = SourceMapsCache;

Libraries/JavaScriptAppEngine/Initialization/SourceMapsUtils.js

@@ -1,88 +0,0 @@
-/**
- * Copyright (c) 2015-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.
- *
- * @providesModule SourceMapsUtils
- * @flow
- */
-
-'use strict';
-
-const Promise = require('Promise');
-const NativeModules = require('NativeModules');
-const SourceMapConsumer = require('SourceMap').SourceMapConsumer;
-const SourceMapURL = require('./source-map-url');
-
-const RCTSourceCode = NativeModules.SourceCode;
-const RCTNetworking = NativeModules.Networking;
-
-const SourceMapsUtils = {
-  fetchMainSourceMap(): Promise {
-    return SourceMapsUtils._getMainSourceMapURL().then(url =>
-      SourceMapsUtils.fetchSourceMap(url)
-    );
-  },
-
-  fetchSourceMap(sourceMappingURL: string): Promise {
-    return fetch(sourceMappingURL)
-      .then(response => response.text())
-      .then(map => new SourceMapConsumer(map));
-  },
-
-  extractSourceMapURL(data: ({url?:string, text?:string, fullSourceMappingURL?:string})): ?string {
-    const url = data.url;
-    const text = data.text;
-    const fullSourceMappingURL = data.fullSourceMappingURL;
-    if (fullSourceMappingURL) {
-      return fullSourceMappingURL;
-    }
-    const mapURL = SourceMapURL.getFrom(text);
-    if (!mapURL) {
-      return null;
-    }
-    if (!url) {
-      return null;
-    }
-    const baseURLs = url.match(/(.+:\/\/.*?)\//);
-    if (!baseURLs || baseURLs.length < 2) {
-      return null;
-    }
-    return baseURLs[1] + mapURL;
-  },
-
-  _getMainSourceMapURL(): Promise {
-    if (global.RAW_SOURCE_MAP) {
-      return Promise.resolve(global.RAW_SOURCE_MAP);
-    }
-
-    if (!RCTSourceCode) {
-      return Promise.reject(new Error('RCTSourceCode module is not available'));
-    }
-
-    if (!RCTNetworking) {
-      // Used internally by fetch
-      return Promise.reject(new Error('RCTNetworking module is not available'));
-    }
-
-    const scriptText = RCTSourceCode.getScriptText();
-    if (scriptText) {
-      return scriptText
-        .then(SourceMapsUtils.extractSourceMapURL)
-        .then((url) => {
-          if (url === null) {
-            return Promise.reject(new Error('No source map URL found. May be running from bundled file.'));
-          }
-          return Promise.resolve(url);
-        });
-    } else {
-      // Running in mock-config mode
-      return Promise.reject(new Error('Couldn\'t fetch script text'));
-    }
-  },
-};
-
-module.exports = SourceMapsUtils;