[cr138] AggregationService::SendReport deleted

These functions were being stubbed off, however they are now deleted,
and therefore these stubs ought to be removed.

Chromium changes:
https://chromium.googlesource.com/chromium/src/+/51abbff317d68b58799cf77daa68971091022978

commit 51abbff317d68b58799cf77daa68971091022978
Author: Nan Lin <[email protected]>
Date:   Fri May 9 08:34:48 2025 -0700

    Remove AggregationService::SendReport

    This public interface is never used on production.

    Change-Id: I0abb46ae9f33a85346daf76f9cd2c88a6976246b
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6525828
    Reviewed-by: Alex Turner <[email protected]>
    Commit-Queue: Nan Lin <[email protected]>
    Cr-Commit-Position: refs/heads/main@{#1458125}

Author: cdesouza-chromium

chromium_src/content/browser/aggregation_service/aggregation_service_impl.cc

@@ -65,22 +65,6 @@ void AggregationServiceImpl::AssembleReport(
     AggregatableReportRequest report_request,
     AssemblyCallback callback) {}
 
-void AggregationServiceImpl::SendReport(
-    const GURL url,
-    const AggregatableReport& report,
-    std::optional<AggregatableReportRequest::DelayType> delay_type,
-    SendCallback callback) {
-  std::move(callback).Run(AggregatableReportSender::RequestStatus::kOk);
-}
-
-void AggregationServiceImpl::SendReport(
-    const GURL url,
-    const base::Value& contents,
-    std::optional<AggregatableReportRequest::DelayType> delay_type,
-    SendCallback callback) {
-  std::move(callback).Run(AggregatableReportSender::RequestStatus::kOk);
-}
-
 const base::SequenceBound<AggregationServiceStorage>&
 AggregationServiceImpl::GetStorage() {
   return storage_;

chromium_src/content/browser/aggregation_service/aggregation_service_impl.h

@@ -72,16 +72,6 @@ class CONTENT_EXPORT AggregationServiceImpl
   // AggregationService:
   void AssembleReport(AggregatableReportRequest report_request,
                       AssemblyCallback callback) override;
-  void SendReport(
-      const GURL url,
-      const AggregatableReport& report,
-      std::optional<AggregatableReportRequest::DelayType> delay_type,
-      SendCallback callback) override;
-  void SendReport(
-      const GURL url,
-      const base::Value& contents,
-      std::optional<AggregatableReportRequest::DelayType> delay_type,
-      SendCallback callback) override;
   void ClearData(base::Time delete_begin,
                  base::Time delete_end,
                  StoragePartition::StorageKeyMatcherFunction filter,