Release Note: Removal of sun.nio.cs.map System Property

The system property `sun.nio.cs.map`, added in JDK 1.4.1, has been removed. It was provided for applications to help migrate from the old definition of `Shift_JIS`, which was equivalent to MS Windows codepage 932, to the one that is defined by IANA. Applications that are using the mapping property will need to designate the correct charset name based on their needs.