[Telemetry] Remove is_smooth flag.

tools/perf/page_sets/key_hit_test_cases.py

 # 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.
 
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class KeyHitTestCasesPage(page_module.Page):
 
@@ skipping 16 matching lines @@
 
   def __init__(self, page_set):
     super(PaperCalculatorHitTest, self).__init__(
       # Generated from https://github.com/zqureshi/paper-calculator
       # vulcanize --inline --strip paper-calculator/demo.html
       url='file://key_hit_test_cases/paper-calculator-no-rendering.html',
       page_set=page_set)
 
   def TapButton(self, action_runner):
     interaction = action_runner.BeginInteraction(
-        'Action_TapAction', is_smooth=True)
+        'Action_TapAction')
     action_runner.TapElement(element_function='''
         document.querySelector(
             'body /deep/ #outerPanels'
         ).querySelector(
             '#standard'
         ).shadowRoot.querySelector(
             'paper-calculator-key[label="5"]'
         )''')
     interaction.End()
 
 
 class KeyHitTestCasesPageSet(page_set_module.PageSet):
 
   def __init__(self):
     super(KeyHitTestCasesPageSet, self).__init__(
       user_agent_type='mobile')
 
     self.AddUserStory(PaperCalculatorHitTest(self))