fix 2-pane conversation view rotate

1-pane and 2-pane each already have hierarchical folder
save/restore, so remove it from the parent class.

Change-Id: I21db65df4ee8cdd2a3b06421b7338cbeda0acc0e
diff --git a/src/com/android/mail/ui/AbstractActivityController.java b/src/com/android/mail/ui/AbstractActivityController.java
index 772bf17..f5ec525 100644
--- a/src/com/android/mail/ui/AbstractActivityController.java
+++ b/src/com/android/mail/ui/AbstractActivityController.java
@@ -1003,22 +1003,6 @@
          * @param savedState
          */
         restoreSelectedConversations(savedState);
-
-        // Enter folder list mode.
-        if (savedState.containsKey(SAVED_HIERARCHICAL_FOLDER)) {
-            try {
-                String folderString = savedState.getString(SAVED_HIERARCHICAL_FOLDER);
-                if (!TextUtils.isEmpty(folderString)) {
-                    Folder folder = Folder.fromJSONString(savedState
-                            .getString(SAVED_HIERARCHICAL_FOLDER));
-                    onFolderSelected(folder);
-                } else {
-                    showFolderList();
-                }
-            } catch (JSONException e) {
-                LogUtils.wtf(LOG_TAG, e, "Unable to parse hierarchical folder extra");
-            }
-        }
     }
 
     private void handleIntent(Intent intent) {