[CT] Update worker scripts to use new benchmarks and delete old benchmarks

ct/py/benchmarks/smoothness.py

-# Copyright 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.
-
-# This file has been copied from
-# https://chromium.googlesource.com/chromium/src/+/master/tools/perf/benchmarks/smoothness.py
-# and modified locally to support CT pagesets. Hopefully one day this file
-# will live in telemetry codebase instead.
-
-from benchmarks import skpicture_printer
-from benchmarks import silk_flags
-import page_sets
-from measurements import smoothness
-from telemetry import benchmark
-
-
-@benchmark.Disabled
-class SmoothnessCTPages(benchmark.Benchmark):
-  test = smoothness.Smoothness
-
-  @classmethod
-  def AddBenchmarkCommandLineArgs(cls, parser):
-    parser.add_option('--page-set-name',  action='store', type='string')
-    parser.add_option('--page-set-base-dir', action='store', type='string')
-
-  @classmethod
-  def ProcessCommandLineArgs(cls, parser, args):
-    if not args.page_set_name:
-      parser.error('Please specify --page-set-name')
-    if not args.page_set_base_dir:
-      parser.error('Please specify --page-set-base-dir')
-
-  def CreateStorySet(self, options):
-    page_set_class = skpicture_printer._MatchPageSetName(
-        options.page_set_name, options.page_set_base_dir)
-    return page_set_class()