Avoid double initializing reporting_service_

components/metrics/metrics_service.cc

Index: components/metrics/metrics_service.cc
diff --git a/components/metrics/metrics_service.cc b/components/metrics/metrics_service.cc
index 05d875b1e97cbb28644a7b477a53d3a4abd7c02f..a82b50502de11df93989aac374e2fda5f5092af7 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -501,8 +501,6 @@ void MetricsService::InitializeMetricsState() {
     version_changed = true;
   }
 
-  reporting_service_.Initialize();
-
   session_id_ = local_state_->GetInteger(prefs::kMetricsSessionID);
 
   StabilityMetricsProvider provider(local_state_);