Revert of Implement a runtime headless mode for Linux

headless/lib/browser/headless_platform_event_source.cc

Index: headless/lib/browser/headless_platform_event_source.cc
diff --git a/headless/lib/browser/headless_platform_event_source.cc b/headless/lib/browser/headless_platform_event_source.cc
deleted file mode 100644
index 7c3100ee4f2d167a73677819f410c395f89a2c87..0000000000000000000000000000000000000000
--- a/headless/lib/browser/headless_platform_event_source.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2016 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 "headless/lib/browser/headless_platform_event_source.h"
-
-namespace headless {
-
-HeadlessPlatformEventSource::HeadlessPlatformEventSource() {}
-
-HeadlessPlatformEventSource::~HeadlessPlatformEventSource() {}
-
-}  // namespace headless