[9] Code Review Request For 8157186: Remove unnecessary @treatasprivate tag in source code

[Chien Yang]

Hi Jonathan and Kevin,

Please review this simple clean up fix.

JIRA: https://bugs.openjdk.java.net/browse/JDK-8157186
Webrev: http://cr.openjdk.java.net/~ckyang/JDK-8157186/webrev.00/index.html