RFR: 8253457: Remove unimplemented register stack functions [v2]

[Aleksey Shipilev]

On Tue, 22 Sep 2020 19:00:12 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Please review removed functions left over from Itanium.
>> 
>> Ran tier1 testing on Oracle platforms (linux-x64, macos-x64, windows-x64 and linux-aarch64) and built on
>> linux-arm32,linux-ppc64le-debug,linux-s390x-debug,linux-x64-zero.
>> Thanks,
>> Coleen
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   added back unintentionally deleted functions

Marked as reviewed by shade (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/300