RFR: 8368525: nmethod ic cleanup

[Hamlin Li]

Hi,
Can you help to review this simple patch?

There is some unused parameter and unnecessary/misleading method in nmethod.cpp, better to clean it up.

Thanks!

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Commit messages:
 - initial commit
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/27464/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27464&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368525
  Stats: 10 lines in 1 file changed: 0 ins; 6 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/27464.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27464/head:pull/27464

PR: https://git.openjdk.org/jdk/pull/27464