Reporting: Remove persistence for now.

net/reporting/reporting_delivery_agent.h

Index: net/reporting/reporting_delivery_agent.h
diff --git a/net/reporting/reporting_delivery_agent.h b/net/reporting/reporting_delivery_agent.h
index e4ed37044537500e071dd2551bf995283f138cb8..d071b7e9355b4a339f352320ce4ba1a0aca5302c 100644
--- a/net/reporting/reporting_delivery_agent.h
+++ b/net/reporting/reporting_delivery_agent.h
@@ -55,11 +55,6 @@ class NET_EXPORT ReportingDeliveryAgent {
 
   virtual ~ReportingDeliveryAgent();
 
-  // Initializes the DeliveryAgent, which schedules delivery (after the Policy's
-  // delivery_interval) for any previously-persisted reports that can still be
-  // delivered.
-  virtual void Initialize() = 0;
-
   // Replaces the internal Timer used for scheduling report delivery attempts
   // with a caller-specified one so that unittests can provide a MockTimer.
   virtual void SetTimerForTesting(std::unique_ptr<base::Timer> timer) = 0;