Removed Todo:CleanUp Comment (#3211)

Removed Todo:CleanUp Comment (#3211)

Author: srsaikumarreddy

core/regions/src/main/java/software/amazon/awssdk/regions/internal/util/EC2MetadataUtils.java

@@ -66,7 +66,6 @@
  * href="http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AESDG-chapter-instancedata.html">Amazon
  * EC2 User Guide: Instance Metadata</a>
  */
-//TODO: cleanup
 @SdkInternalApi
 public final class EC2MetadataUtils {
     private static final JsonNodeParser JSON_PARSER = JsonNode.parser();