Remove redundant use of public modifier.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1543277 13f79535-47bb-0310-9956-ffa450edef68
Remove redundant use of public modifier.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1543278 13f79535-47bb-0310-9956-ffa450edef68