Address feedback

Author: ThomsonTan

CHANGELOG.md

@@ -33,8 +33,7 @@ Increment the:
 * [BUILD] Use -dev versions in main branch
   [#3609](https://github.com/open-telemetry/opentelemetry-cpp/pull/3609)
 
-* [SDK] Implementing configurable aggregation cardinality limit and collector
-  emitting all views instead of last view
+* [SDK] Implementing configurable aggregation cardinality limit
   [#3624](https://github.com/open-telemetry/opentelemetry-cpp/pull/3624)
 
 Important changes:

sdk/include/opentelemetry/sdk/metrics/state/sync_metric_storage.h

@@ -66,7 +66,7 @@ class SyncMetricStorage : public MetricStorage, public SyncWritableMetricStorage
                     const AggregationConfig *aggregation_config)
       : instrument_descriptor_(instrument_descriptor),
         aggregation_config_(aggregation_config),
-        attributes_hashmap_(new AttributesHashMap(aggregation_config
+        attributes_hashmap_(std::make_unique<AttributesHashMap>(aggregation_config
                                                       ? aggregation_config->cardinality_limit_
                                                       : kAggregationCardinalityLimit)),
         attributes_processor_(std::move(attributes_processor)),