RFR: Purge StubRoutines::code3() block

[Roman Kennke]

Yes.

I've removed that in jdk9 last week I think.

Roman

> StubRoutines::code3() is gone long ago. Some debug code under #ifdef 0 still has
> the reference to it, which shows up in merges. Let's purge:
>
> $ hg diff
> diff -r da56c185b6a9 src/cpu/aarch64/vm/sharedRuntime_aarch64.cpp
> --- a/src/cpu/aarch64/vm/sharedRuntime_aarch64.cpp	Tue Jul 11 13:35:57 2017 +0200
> +++ b/src/cpu/aarch64/vm/sharedRuntime_aarch64.cpp	Tue Jul 11 13:38:33 2017 +0200
> @@ -538,10 +538,6 @@
>        range_check(masm, rax, r11,
>                    StubRoutines::code2()->code_begin(),
> StubRoutines::code2()->code_end(),
>                    L_ok);
> -    if (StubRoutines::code3() != NULL)
> -      range_check(masm, rax, r11,
> -                  StubRoutines::code3()->code_begin(),
> StubRoutines::code3()->code_end(),
> -                  L_ok);
>      const char* msg = "i2c adapter must return to an interpreter frame";
>      __ block_comment(msg);
>      __ stop(msg);
>
> Thanks,
> -Aleksey
>