RFR: 8255721: Remove no-op clean_weak_method_links methods [v2]

[Tobias Hartmann]

On Mon, 2 Nov 2020 10:12:09 GMT, Claes Redestad <redestad at openjdk.org> wrote:

>> ProfileData:: and DataLayout::clean_weak_method_links are both virtual but empty methods with no overrides, so removing them and simplifying MethodData::clean_weak_method_links should be a minor clean-up and possibly speed-up redefinition a notch.
>
> Claes Redestad 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 three additional commits since the last revision:
> 
>  - Merge branch 'master' into methoddata_cleanup
>  - Remove undefined declaration
>  - Clean-up no-op clean_weak_method_links

Marked as reviewed by thartmann (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/990