[10] RFR (XS) 8183902: Remove unnecessary definitions in locale_str.h for macOS

[Naoto Sato]

Hello,

Please review this small fix to the following issue:

https://bugs.openjdk.java.net/browse/JDK-8183902

The proposed fix is located at:

http://cr.openjdk.java.net/~naoto/8183902/webrev.00/

This is a leftover fix to 8160199. With the fix to 8160199, there is no 
need to supplement the language aliases for macOS, as they are all 
accompanied with designated country code.

Naoto