Revert of Add process uptime metadata event in tracing

base/process/process_info_unittest.cc

Index: base/process/process_info_unittest.cc
diff --git a/base/process/process_info_unittest.cc b/base/process/process_info_unittest.cc
deleted file mode 100644
index a757774fdad8a98f3a33b1372b12a100fa45ced7..0000000000000000000000000000000000000000
--- a/base/process/process_info_unittest.cc
+++ /dev/null
@@ -1,20 +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 "base/process/process_info.h"
-
-#include "base/time/time.h"
-#include "build/build_config.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace base {
-
-#if !defined(OS_IOS)
-TEST(ProcessInfoTest, CreationTime) {
-  Time creation_time = CurrentProcessInfo::CreationTime();
-  ASSERT_FALSE(creation_time.is_null());
-}
-#endif  // !defined(OS_IOS)
-
-}  // namespace base