Summary

Remove support for opt-in file path normalization via a system property on macOS.

Problem

APFS has been the macOS file system since September 2017 when it succeeded HFS+. No currently supported version of macOS uses HFS+ ,yet the JDK still has a system property to allow opting in to file path normalization.

Solution

Remove the system property jdk.nio.path.useNormalizationFormD and code which would never be executed in its absence.

Specification

Running with -Djdk.nio.path.useNormalizationFormD or -Djdk.nio.path.useNormalizationFormD=true will no longer have any effect, i.e., file paths will no longer be normalized to Unicode Normalization Form D when the property is set.