Reland [telemetry] Timeline model cleanups

tools/telemetry/telemetry/core/timeline/tracing/sample.py

Index: tools/telemetry/telemetry/core/timeline/tracing/sample.py
diff --git a/tools/telemetry/telemetry/core/timeline/tracing/sample.py b/tools/telemetry/telemetry/core/timeline/tracing/sample.py
deleted file mode 100644
index 5f7f672d9d478593812a5da16b9c9df1b3d54550..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/core/timeline/tracing/sample.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# 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.
-
-import telemetry.core.timeline.event as timeline_event
-
-class Sample(timeline_event.TimelineEvent):
-  ''' A Sample represents a sample taken at an instant in time
-  plus parameters associated with that sample.
-
-  NOTE: The Sample class implements the same interface as
-  Slice. These must be kept in sync.
-
-  All time units are stored in milliseconds.
-  '''
-  def __init__(self, category, name, timestamp, args=None, parent=None):
-    super(Sample, self).__init__(
-        name, timestamp, 0, args=args, parent=parent)
-    self.category = category