RFR: 8344333: Spurious System.err.flush() in LWCToolkit.java

[Phil Race]

trivial internal cleanup

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

Commit messages:
 - 8344333

Changes: https://git.openjdk.org/jdk/pull/26931/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26931&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344333
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26931.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26931/head:pull/26931

PR: https://git.openjdk.org/jdk/pull/26931