Revert "Improve data structure for deprecated files"

This reverts commit aed9fd9.

packages/jest-haste-map/src/index.js

@@ -37,7 +37,6 @@ import type {Mapper} from './types';
 import type {Path} from 'types/Config';
 import type {
   HasteMap as HasteMapObject,
-  FileData as HasteMapFileData,
   InternalHasteMap,
   ModuleMetaData,
   ModuleMapData,
@@ -361,7 +360,7 @@ class HasteMap extends EventEmitter {
    * 2. crawl the file system.
    */
   _buildFileMap(): Promise<{
-    deprecatedFiles: HasteMapFileData,
+    deprecatedFiles: Array<{moduleName: string, path: string}>,
     hasteMap: InternalHasteMap,
   }> {
     const read = this._options.resetCache ? this._createEmptyMap : this.read;
@@ -372,10 +371,10 @@ class HasteMap extends EventEmitter {
       .then(cachedHasteMap => {
         const cachedFiles = new Map(cachedHasteMap.files);
         return this._crawl(cachedHasteMap).then(hasteMap => {
-          const deprecatedFiles = new Map();
+          const deprecatedFiles = [];
           for (const [fileName, fileData] of cachedFiles) {
             if (!hasteMap.files.has(fileName)) {
-              deprecatedFiles.set(fileName, fileData);
+              deprecatedFiles.push({path: fileName, moduleName: fileData[H.ID]});
             }
           }
           return {deprecatedFiles, hasteMap};
@@ -579,17 +578,17 @@ class HasteMap extends EventEmitter {
   }
 
   _buildHasteMap(data: {
-    deprecatedFiles: HasteMapFileData,
+    deprecatedFiles: Array<{moduleName: string, path: string}>,
     hasteMap: InternalHasteMap,
   }): Promise<InternalHasteMap> {
     const {deprecatedFiles, hasteMap} = data;
     const map = new Map();
     const mocks = new Map();
     const promises = [];
 
-    for (const [filePath, fileData] of deprecatedFiles) {
-      const moduleName = fileData[H.ID];
-      this._recoverDuplicates(hasteMap, filePath, moduleName);
+    for (let i = 0; i < deprecatedFiles.length; ++i) {
+      const file = deprecatedFiles[i];
+      this._recoverDuplicates(hasteMap, file.path, file.moduleName);
     }
 
     for (const relativeFilePath of hasteMap.files.keys()) {