diff --git a/tracker/issuedetailezt.py b/tracker/issuedetailezt.py
index 3a10443..233ea57 100644
--- a/tracker/issuedetailezt.py
+++ b/tracker/issuedetailezt.py
@@ -1,7 +1,6 @@
-# Copyright 2016 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 or at
-# https://developers.google.com/open-source/licenses/bsd
+# Copyright 2016 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 
 """Classes that implement the issue detail page and related forms.
 
@@ -14,45 +13,20 @@
 from __future__ import division
 from __future__ import absolute_import
 
-import json
-import logging
-import time
-import ezt
-
 import settings
-from api import converters
 from businesslogic import work_env
 from features import features_bizobj
-from features import send_notifications
 from features import hotlist_helpers
-from features import hotlist_views
 from framework import exceptions
-from framework import flaskservlet
-from framework import framework_bizobj
-from framework import framework_constants
 from framework import framework_helpers
-from framework import framework_views
 from framework import jsonfeed
-from framework import paginate
 from framework import permissions
 from framework import servlet
 from framework import servlet_helpers
-from framework import sorting
-from framework import sql
-from framework import template_helpers
 from framework import urls
-from framework import xsrf
-from proto import user_pb2
-from proto import tracker_pb2
 from services import features_svc
-from services import tracker_fulltext
-from tracker import field_helpers
-from tracker import tracker_bizobj
 from tracker import tracker_constants
 from tracker import tracker_helpers
-from tracker import tracker_views
-
-from google.protobuf import json_format
 
 
 def CheckMoveIssueRequest(
@@ -126,9 +100,7 @@
 
 class FlipperRedirectBase(servlet.Servlet):
 
-  # pylint: disable=arguments-differ
-  # pylint: disable=unused-argument
-  def get(self, project_name=None, viewed_username=None, hotlist_id=None):
+  def get(self):
     with work_env.WorkEnv(self.mr, self.services) as we:
       hotlist_id = self.mr.GetIntParam('hotlist_id')
       current_issue = we.GetIssueByLocalID(self.mr.project_id, self.mr.local_id,
@@ -159,24 +131,22 @@
 class FlipperNext(FlipperRedirectBase):
   next_handler = True
 
-  # def GetFlipperNextRedirectPage(self, **kwargs):
-  #   self.next_handler = True
-  #   return self.handler(**kwargs)
+  def GetFlipperNextRedirectPage(self, **kwargs):
+    self.next_handler = True
+    return self.handler(**kwargs)
 
 
 class FlipperPrev(FlipperRedirectBase):
   next_handler = False
 
-  # def GetFlipperPrevRedirectPage(self, **kwargs):
-  #   self.next_handler = False
-  #   return self.handler(**kwargs)
+  def GetFlipperPrevRedirectPage(self, **kwargs):
+    self.next_handler = False
+    return self.handler(**kwargs)
 
 
 class FlipperList(servlet.Servlet):
-  # pylint: disable=arguments-differ
-  # pylint: disable=unused-argument
-  # TODO: (monorail:6511)change to get(self) when convert to flask
-  def get(self, project_name=None, viewed_username=None, hotlist_id=None):
+
+  def get(self):
     with work_env.WorkEnv(self.mr, self.services) as we:
       hotlist_id = self.mr.GetIntParam('hotlist_id')
       current_issue = we.GetIssueByLocalID(self.mr.project_id, self.mr.local_id,
@@ -199,11 +169,10 @@
                                                hotlist, self.services)
     self.redirect(url)
 
-  # def GetFlipperList(self, **kwargs):
-  #   return self.handler(**kwargs)
+  def GetFlipperList(self, **kwargs):
+    return self.handler(**kwargs)
 
 
-# TODO: (monorail:6511) change to flaskJsonFeed when convert to flask
 class FlipperIndex(jsonfeed.JsonFeed):
   """Return a JSON object of an issue's index in search.
 
@@ -274,11 +243,11 @@
       'total_count': total_count,
     }
 
-  # def GetFlipperIndex(self, **kwargs):
-  #   return self.handler(**kwargs)
+  def GetFlipperIndex(self, **kwargs):
+    return self.handler(**kwargs)
 
-  # def PostFlipperIndex(self, **kwargs):
-  #   return self.handler(**kwargs)
+  def PostFlipperIndex(self, **kwargs):
+    return self.handler(**kwargs)
 
 
 def _ShouldShowFlipper(mr, services):