Remove time ticks metrics and MetricServiceClient::OnLogUploadComplete

ios/chrome/today_extension/today_metrics_logger.mm

Index: ios/chrome/today_extension/today_metrics_logger.mm
diff --git a/ios/chrome/today_extension/today_metrics_logger.mm b/ios/chrome/today_extension/today_metrics_logger.mm
index e48119bf3dbce939809a199d8fcd5494fbca7d93..08093ddc23ba699c047b11192a0ffc1bb13d4351 100644
--- a/ios/chrome/today_extension/today_metrics_logger.mm
+++ b/ios/chrome/today_extension/today_metrics_logger.mm
@@ -62,7 +62,6 @@ class TodayMetricsServiceClient : public metrics::MetricsServiceClient {
   bool GetBrand(std::string* brand_code) override;
   metrics::SystemProfileProto::Channel GetChannel() override;
   std::string GetVersionString() override;
-  void OnLogUploadComplete() override;
   void InitializeSystemProfileMetrics(
       const base::Closure& done_callback) override;
   void CollectFinalMetricsForLog(const base::Closure& done_callback) override;
@@ -135,10 +134,6 @@ std::string TodayMetricsServiceClient::GetVersionString() {
   return metrics::GetVersionString();
 }
 
-void TodayMetricsServiceClient::OnLogUploadComplete() {
-  NOTREACHED();
-}
-
 void TodayMetricsServiceClient::InitializeSystemProfileMetrics(
     const base::Closure& done_callback) {
   NOTREACHED();