RFR: 8366984: Remove delay slot support

[Daniel Jeliński]

On Tue, 9 Sep 2025 10:56:04 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> SPARC was the only supported architecture that uses a delay slot. The SPARC port was removed in JDK 15, and the code is effectively dead. Let's remove it.
>> 
>> The changes are no-op on all architectures that do not use delay slots. I still tested tier 1-5 on mach5, no related failures.
>
> Thanks for the answers!
> 
> You'll of course have to merge the dependency, and get a second review :)

Thanks @eme64 and @dean-long for the reviews!

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

PR Comment: https://git.openjdk.org/jdk/pull/27119#issuecomment-3273459678