fix DeleteItemAsync when span pointers disabled

Author: nhulston

tracer/src/Datadog.Trace/ClrProfiler/AutoInstrumentation/AWS/DynamoDb/DeleteItemAsyncIntegration.cs

@@ -52,6 +52,11 @@ internal static CallTargetState OnMethodBegin<TTarget, TDeleteItemRequest>(TTarg
             var scope = AwsDynamoDbCommon.CreateScope(Tracer.Instance, Operation, out AwsDynamoDbTags tags);
             AwsDynamoDbCommon.TagTableNameAndResourceName(request.TableName, tags, scope);
 
+            if (!Tracer.Instance.Settings.SpanPointersEnabled)
+            {
+                return new CallTargetState(scope);
+            }
+
             var tableName = request.TableName;
             try
             {