Revert of Have each SandboxedProcessLauncherDelegate maintain a zygote.

content/browser/zygote_host/zygote_handle_linux.cc

Index: content/browser/zygote_host/zygote_handle_linux.cc
diff --git a/content/browser/zygote_host/zygote_handle_linux.cc b/content/browser/zygote_host/zygote_handle_linux.cc
deleted file mode 100644
index 89adc49385b4364803f4cd14fc64a4e7fbfa25d6..0000000000000000000000000000000000000000
--- a/content/browser/zygote_host/zygote_handle_linux.cc
+++ /dev/null
@@ -1,17 +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 "content/public/browser/zygote_handle_linux.h"
-
-#include "content/browser/zygote_host/zygote_communication_linux.h"
-
-namespace content {
-
-ZygoteHandle CreateZygote() {
-  ZygoteHandle zygote = new ZygoteCommunication();
-  zygote->Init();
-  return zygote;
-}
-
-}  // namespace content