[12] RFR 8208560: ChoiceFormat class has unused constants needs cleanup

[Nishit Jain]

Hi,

Please review this cleanup fix for 8208560
Bug: https://bugs.openjdk.java.net/browse/JDK-8208560
Webrev: http://cr.openjdk.java.net/~nishjain/8208560/webrev.00/

Cause and Fix: Changes made for JDK-8021322 has left some unused static 
fields, not sure why these fields have package private access, but they 
are not getting used elsewhere in the package. Removed them from 
ChoiceFormat class.

Regards,
Nishit Jain