Revert of [Chromoting] Retrieve process resource usage (ProcessStats) and its tests

remoting/host/forward_process_stats_agent.cc

Index: remoting/host/forward_process_stats_agent.cc
diff --git a/remoting/host/forward_process_stats_agent.cc b/remoting/host/forward_process_stats_agent.cc
deleted file mode 100644
index c75bc517552a5a6a89f2b816f26ca99f7cf21fb5..0000000000000000000000000000000000000000
--- a/remoting/host/forward_process_stats_agent.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2017 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.
-
-#include "remoting/host/forward_process_stats_agent.h"
-
-#include "base/logging.h"
-
-namespace remoting {
-
-ForwardProcessStatsAgent::ForwardProcessStatsAgent() = default;
-ForwardProcessStatsAgent::~ForwardProcessStatsAgent() = default;
-
-protocol::ProcessResourceUsage ForwardProcessStatsAgent::GetResourceUsage() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return usage_;
-}
-
-void ForwardProcessStatsAgent::OnProcessStats(
-    const protocol::ProcessResourceUsage& usage) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  usage_ = usage;
-}
-
-}  // namespace remoting