hg: jdk/hs: 8195857: Remove os::is_headless_jre

[david.holmes at oracle.com]

Changeset: c092a2fbb7c3
Author:    mbaesken
Date:      2018-01-28 19:49 -0500
URL:       http://hg.openjdk.java.net/jdk/hs/rev/c092a2fbb7c3

8195857: Remove os::is_headless_jre
Reviewed-by: goetz, dholmes

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/solaris/os_solaris.cpp
! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/share/runtime/arguments.cpp
! src/hotspot/share/runtime/os.hpp