RFR: 8256738: Compiler interface clean-up

[Nils Eliasson]

On Fri, 20 Nov 2020 11:24:51 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> This patch removes dead code in the ci area.
> 
> There's also a trivial micro-optimization to is_boxing_method/is_unboxing_method

Nice clean up!

-------------

Marked as reviewed by neliasso (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1345