RFR: 8356172: IdealGraphPrinter doesn't need ThreadCritical

[Coleen Phillimore]

Please review this possibly trivial change.
Tested with hs-precheckin-comp test list.

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

Commit messages:
 - 8356172: IdealGraphPrinter doesn't need ThreadCritical

Changes: https://git.openjdk.org/jdk/pull/25035/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25035&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356172
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25035.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25035/head:pull/25035

PR: https://git.openjdk.org/jdk/pull/25035