Remove a spammy log message from metrics collections.

Removes an unneccessary and noisy log message.

Bug: 77975999

Test: Re-ran unit tests. Tested with Google Play.
Change-Id: Ibec69a4e72231a87b2bb3c9c341e5ea0af352715

libwvdrmengine/cdm/metrics/src/metrics_collections.cpp

@@ -276,8 +276,6 @@ void EngineMetrics::Serialize(WvCdmMetrics *wv_metrics) const {
         app_package_name_);
   }
   SerializeEngineMetrics(engine_metrics);
-  LOGE("Serializing session metrics. Session Count: %d",
-       session_metrics_list_.size());
 
   for (std::vector<metrics::SessionMetrics *>::const_iterator it =
        session_metrics_list_.begin(); it != session_metrics_list_.end(); it++) {