Remove old cloud policy code.

chrome/browser/policy/proto/old_generic_format.proto

-// Copyright (c) 2011 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.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-package enterprise_management;
-
-// This file keeps the deprecated GenericNamedValue based format for policies
-// available. It is intended to be removed (along with all code that makes
-// use of it) as soon as all server-side components (CPanel, D3) have been
-// migrated to provide the new, explicitly typed format to clients.
-
-// A setting is a set of generic name value pairs.
-message GenericSetting {
-  repeated GenericNamedValue named_value = 1;
-}
-
-// Generic value container.
-message GenericValue {
-  enum ValueType {
-    VALUE_TYPE_BOOL = 1;
-    VALUE_TYPE_INT64 = 2;
-    VALUE_TYPE_STRING = 3;
-    VALUE_TYPE_DOUBLE = 4;
-    VALUE_TYPE_BYTES = 5;
-    VALUE_TYPE_BOOL_ARRAY = 6;
-    VALUE_TYPE_INT64_ARRAY = 7;
-    VALUE_TYPE_STRING_ARRAY = 8;
-    VALUE_TYPE_DOUBLE_ARRAY = 9;
-  }
-
-  optional ValueType value_type = 1 [default = VALUE_TYPE_STRING];
-
-  // basic value types
-  optional bool bool_value = 2;
-  optional int64 int64_value = 3;
-  optional string string_value = 4;
-  optional double double_value = 5;
-  optional bytes bytes_value = 6;
-  repeated bool bool_array = 7;
-  repeated int64 int64_array = 8;
-  repeated string string_array = 9;
-  repeated double double_array = 10;
-}
-
-// Generic name value pair container.
-message GenericNamedValue {
-  required string name = 1;
-  optional GenericValue value = 2;
-}
-
-// Wrapper that contains the above. Designed to be a partial view of the
-// data the server currently delivers.
-message LegacyChromeSettingsProto {
-  repeated GenericNamedValue named_value = 2;
-}