RFR(M) JDK-8031819: Remove legacy jdk checks and code

[Christian Thalinger]

src/share/vm/runtime/thread.cpp:
    // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This
    // has to be fixed by a runtime query method
-   if (!destroy_vm || JDK_Version::is_jdk12x_version()) {
Maybe change the comment.

On Jun 4, 2014, at 8:34 AM, harold seigel <harold.seigel at oracle.com> wrote:

> Hi,
> 
> Please review this JDK 9 fix for bug JDK-8031819.  The fix removes legacy code for old JDK versions.  Although the webrev contains lots of files, the changes are not complicated.
> 
> Open webrev: http://cr.openjdk.java.net/~hseigel/bug_8031819/
> Bug: https://bugs.openjdk.java.net/browse/JDK-8031819
> 
> The fix was tested with the Hotspot JTREG tests, JCK Lang, VM, and API/java_lang tests, nsk Quick tests, and JPRT.
> 
> Thanks! Harold