Telemetry: remove the heap snapshot half-feature.

tools/telemetry/telemetry/core/heap/retaining_edge.py

Index: tools/telemetry/telemetry/core/heap/retaining_edge.py
diff --git a/tools/telemetry/telemetry/core/heap/retaining_edge.py b/tools/telemetry/telemetry/core/heap/retaining_edge.py
deleted file mode 100644
index d6b9978ce6a12a5d4f287459b665cd42f10d7ab1..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/core/heap/retaining_edge.py
+++ /dev/null
@@ -1,52 +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.
-
-class RetainingEdge(object):
-  """Data structure for representing a retainer relationship between objects.
-
-  Attributes:
-    from_object_id: int, id of the object which is the start point of this
-        RetainingEdge.  Used when the corresponding LiveHeapObject object is not
-        yet contstructed.
-    to_object_id: int, id of the object which is the end point of this
-        RetainingEdge. Used when the corresponding LiveHeapObject object is not
-        yet contstructed.
-    from_object: LiveHeapObject, the start point of this RetainingEdge.
-    to_object: LiveHeapObject, the end point of this RetainingEdge.
-    type_string: str, the type of the RetainingEdge.
-    name_string: str, the JavaScript attribute name this RetainingEdge
-        represents.
-  """
-
-  def __init__(self, from_object_id, to_object_id, type_string, name_string):
-    """Initializes the RetainingEdge object.
-
-    Args:
-      from_object_id: int, id of the object which is the start point of this
-          RetainingEdge. Used when the corresponding LiveHeapObject object is
-          not yet contstructed.
-      to_object_id: int, id of the object which is the end point of this
-          RetainingEdge. Used when the corresponding LiveHeapObject object is
-          not yet contstructed.
-      type_string: str, the type of the RetainingEdge.
-      name_string: str, the JavaScript attribute name this RetainingEdge
-          represents.
-    """
-    self.from_object_id = from_object_id
-    self.to_object_id = to_object_id
-    self.from_object = {}
-    self.to_object = {}
-    self.type_string = type_string
-    self.name_string = name_string
-
-  def SetFromObject(self, obj):
-    self.from_object = obj
-    return self
-
-  def SetToObject(self, obj):
-    self.to_object = obj
-    return self
-
-  def __str__(self):
-    return 'RetainingEdge(' + self.type_string + ' ' + self.name_string + ')'