RFR: 8250914: Matcher::stack_direction() is unused

[Roberto Castañeda Lozano]

On Fri, 11 Sep 2020 11:35:15 GMT, Roberto Castañeda Lozano <github.com+8792647+robcasloz at openjdk.org> wrote:

>> Looks good to me.
>
> Thanks Vladimir and Tobias!

Remove unused Matcher::stack_direction() together with related ADL entries and
ADLC support.

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PR: https://git.openjdk.java.net/jdk/pull/125