RFR: 8255617: Zero: purge the remaining bytecode interpreter profiling support [v2]

[Aleksey Shipilev]

On Tue, 3 Nov 2020 08:49:11 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
>> 
>>  - Merge branch 'master' into JDK-8255617-zero-purge-bi-profiliing
>>  - Also remove now unused BytecodeInterpreter::mdx field
>>  - Remove leftover variable
>>  - Remove leftover comments
>>  - 8255617: Zero: purge the remaining bytecode interpreter profiling support
>
> Marked as reviewed by jiefu (Committer).

I also figured we don't need `mdx` field in `BytecodeInterpreter` now. Removed. Plus a few comments/variables removed. Please take a look again, if you can.

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PR: https://git.openjdk.java.net/jdk/pull/944