Un-deprecated a widely used method.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1554905 13f79535-47bb-0310-9956-ffa450edef68
Removed unneeded method.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1554906 13f79535-47bb-0310-9956-ffa450edef68