Remove windows/mac/ios specific code from //ui

ui/events/PRESUBMIT.py

Index: ui/events/PRESUBMIT.py
diff --git a/ui/events/PRESUBMIT.py b/ui/events/PRESUBMIT.py
deleted file mode 100644
index bc905a3f62811364d7652fcdf78a871c1803b1d5..0000000000000000000000000000000000000000
--- a/ui/events/PRESUBMIT.py
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2014 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.
-
-"""Chromium presubmit script for src/ui/events
-
-See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
-for more details on the presubmit API built into gcl.
-"""
-
-def GetPreferredTryMasters(project, change):
-  tests = set(['ash_unittests',
-               'aura_unittests',
-               'events_unittests',
-               'keyboard_unittests',
-               'views_unittests'])
-
-  return {
-    'tryserver.chromium.linux': {
-      'linux_chromium_rel_swarming': tests,
-      'linux_chromium_chromeos_rel_swarming': tests,
-      'linux_chromeos_asan': tests,
-    },
-    'tryserver.chromium.win': {
-      'win_chromium_compile_dbg': tests,
-      'win_chromium_rel_swarming': tests,
-    }
-  }