Remove all code related to the PreRead field trial.

chrome/app/chrome_exe_main_win.cc

Index: chrome/app/chrome_exe_main_win.cc
diff --git a/chrome/app/chrome_exe_main_win.cc b/chrome/app/chrome_exe_main_win.cc
index 2ec47c28f7acd8b041b50be94cbc7a6934ff9c19..22ec4bf4f40a6c8b4a9efa2e68ec11aef881fca3 100644
--- a/chrome/app/chrome_exe_main_win.cc
+++ b/chrome/app/chrome_exe_main_win.cc
@@ -34,7 +34,6 @@
 #include "components/crash/content/app/crashpad.h"
 #include "components/crash/content/app/run_as_crashpad_handler_win.h"
 #include "components/startup_metric_utils/browser/startup_metric_utils.h"
-#include "components/startup_metric_utils/common/pre_read_field_trial_utils_win.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
 
@@ -214,9 +213,6 @@ int main() {
   const std::string process_type =
       command_line->GetSwitchValueASCII(switches::kProcessType);
 
-  startup_metric_utils::InitializePreReadOptions(
-      BrowserDistribution::GetDistribution()->GetRegistryPath());
-
   // Confirm that an explicit prefetch profile is used for all process types
   // except for the browser process. Any new process type will have to assign
   // itself a prefetch id. See kPrefetchArgument* constants in