hg: jdk/client: 8222819: Remove setting of headless property on MacOS from launcher code.

[philip.race at oracle.com]

Changeset: 72d194129803
Author:    prr
Date:      2019-05-03 17:06 -0700
URL:       http://hg.openjdk.java.net/jdk/client/rev/72d194129803

8222819: Remove setting of headless property on MacOS from launcher code.
Reviewed-by: serb, rriggs

! src/java.base/macosx/native/libjava/java_props_macosx.c
! src/java.base/macosx/native/libjava/java_props_macosx.h
! src/java.base/share/classes/jdk/internal/util/SystemProps.java
! src/java.base/share/native/libjava/System.c
! src/java.base/share/native/libjava/java_props.h
! src/java.base/unix/native/libjava/java_props_md.c