RFR: 8264806: Remove the experimental JIT compiler [v2]

[Vladimir Kozlov]

On Tue, 13 Apr 2021 09:30:23 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

>> We would definitely like to be able to continue testing of GraalVM with the JDK set of jtreg tests. So keeping `Compiler::isGraalEnabled()` working like it does today is important.
>
>> @dougxc I restored Compiler::isGraalEnabled().
> 
> Thanks. I guess this should really be named `isJVMCICompilerEnabled` now and the `vm.graal.enabled` predicate renamed to `vm.jvmcicompiler.enabled` but maybe that's too big a change (or can be done later).

@dougxc
Renaming should be done separately. May be use RFE I filed: https://bugs.openjdk.java.net/browse/JDK-8265032

Do you approve these Graal removal changes?

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

PR: https://git.openjdk.java.net/jdk/pull/3421