[PageLoadMetrics] Remove legacy IPC from Page Load Metrics.

chrome/common/chrome_features.cc

 // 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 "chrome/common/chrome_features.h"
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "extensions/features/features.h"
 #include "ppapi/features/features.h"
@@ skipping 360 matching lines @@
 
 // Enables or disables Chrome OS Component updates on Chrome OS.
 const base::Feature kCrOSComponent{"CrOSComponent",
                                    base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables or disables Instant Tethering on Chrome OS.
 const base::Feature kInstantTethering{"InstantTethering",
                                       base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_CHROMEOS)
 
-// Enables or disables Page Load Metrics using mojo IPC.
-const base::Feature kPageLoadMetricsMojofication{
-    "PLMMojofication", base::FEATURE_DISABLED_BY_DEFAULT};
-
 bool PrefServiceEnabled() {
   return base::FeatureList::IsEnabled(features::kPrefService) ||
 #if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
          base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
              switches::kMusConfig) == switches::kMash;
 #else
          false;
 #endif
 }
 
 }  // namespace features