Clean up unnecessary codes when deleting a custom wallpaper

chrome/browser/resources/chromeos/wallpaper_manager/js/event_page.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var WALLPAPER_PICKER_WIDTH = 574;
 var WALLPAPER_PICKER_HEIGHT = 420;
 
 var wallpaperPickerWindow;
 
 var surpriseWallpaper = null;
@@ skipping 278 matching lines @@
                   // localData might be null on a powerwashed device.
                   WallpaperUtil.storeWallpaperFromSyncFSToLocalFS(
                       detail.fileEntry);
                 }
              });
         } else if (detail.action == 'deleted') {
           var fileName = detail.fileEntry.name.replace(
               Constants.CustomWallpaperThumbnailSuffix, '');
           WallpaperUtil.deleteWallpaperFromLocalFS(fileName);
         }
-      } else {  // detail.direction == 'local_to_remote'
-        if (detail.action == 'deleted') {
-          WallpaperUtil.deleteWallpaperFromSyncFS(detail.fileEntry.name);
-          WallpaperUtil.deleteWallpaperFromLocalFS(detail.fileEntry.name);
-        }
       }
     }
   });
 });
 
 chrome.storage.onChanged.addListener(function(changes, namespace) {
   WallpaperUtil.enabledSyncThemesCallback(function(syncEnabled) {
     if (syncEnabled) {
       // If sync theme is enabled, use values from chrome.storage.sync to sync
       // wallpaper changes.
@@ skipping 110 matching lines @@
 
   // Make third party wallpaper syncable through different devices.
   // TODO(xdai): also sync the third party app name.
   var filename = Constants.ThirdPartyWallpaperPrefix + new Date().getTime();
   var thumbnailFilename = filename + Constants.CustomWallpaperThumbnailSuffix;
   WallpaperUtil.storeWallpaperToSyncFS(filename, wallpaper);
   WallpaperUtil.storeWallpaperToSyncFS(thumbnailFilename, thumbnail);
   WallpaperUtil.saveWallpaperInfo(filename, layout,
                                   Constants.WallpaperSourceEnum.Custom);
 });