RFR: CODETOOLS-7903210: JOL: Minor code cleanups [v2]

[Steafan Chou]

> Hi friends,I am studying the JOL source,i cleaned some code,thanks.

Steafan Chou has updated the pull request incrementally with one additional commit since the last revision:

  revert GraphInstanceBench 49 line.

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

Changes:
  - all: https://git.openjdk.org/jol/pull/26/files
  - new: https://git.openjdk.org/jol/pull/26/files/9d118630..f2e38258

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jol&pr=26&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jol&pr=26&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jol/pull/26.diff
  Fetch: git fetch https://git.openjdk.org/jol pull/26/head:pull/26

PR: https://git.openjdk.org/jol/pull/26