RFR: 8319649: inline_boxing_calls unused gvn variable

[Joshua Cao]

Passes tier1 tests locally

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Commit messages:
 - 8319649: inline_boxing_calls unused gvn variable

Changes: https://git.openjdk.org/jdk/pull/16544/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16544&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319649
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16544.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16544/head:pull/16544

PR: https://git.openjdk.org/jdk/pull/16544