RFR: 8253040 : Remove unused Matcher::regnum_to_fpu_offset()

[John Tortugo]

On Tue, 15 Sep 2020 22:43:06 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Relates to: https://bugs.openjdk.java.net/browse/JDK-8253040
>> Tested on: x86_64 - Linux - Tier1
>> 
>> Remove unused method `Matcher::regnum_to_fpu_offset()` from source base.
>
> Looks good.

@iwanowww - Can you please merge this PR?

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PR: https://git.openjdk.java.net/jdk/pull/194