Revert of Create classes_util API, change discover to return a list instead of a dict.

tools/telemetry/telemetry/util/classes_util.py

Index: tools/telemetry/telemetry/util/classes_util.py
diff --git a/tools/telemetry/telemetry/util/classes_util.py b/tools/telemetry/telemetry/util/classes_util.py
deleted file mode 100644
index 1496d896311f847ca6453caf9bb5958e9bf57126..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/util/classes_util.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright 2015 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.core import discover
-from telemetry.internal.util import camel_case
-
-
-def DiscoverClasses(start_dir, top_level_dir, base_class,
-                    directly_constructable=False):
-  return discover.DiscoverClasses(start_dir, top_level_dir, base_class,
-                                  directly_constructable=directly_constructable)
-
-def DiscoverClassesByClassName(
-    start_dir, top_level_dir, base_class, directly_constructable=False):
-  classes_dict = {}
-  classes = discover.DiscoverClasses(
-      start_dir, top_level_dir, base_class,
-      directly_constructable=directly_constructable)
-  for class_obj in classes:
-    classes_dict[camel_case.ToUnderscore(class_obj.__name__)] = class_obj
-  return classes_dict
-
-def MaybeGetInstanceOfClass(target, start_dir, top_level_dir, cls):
-  classes = DiscoverClassesByClassName(
-      start_dir, top_level_dir, cls, directly_constructable=True)
-  return classes[target]() if target in classes else None