RFR: JDK-8307869: Remove unnecessary log statements from arm32 fastlocking code

[Thomas Stuefe]

Trivial patch to remove some logging.

Remnant of [JDK-8291555](https://bugs.openjdk.org/browse/JDK-8291555): During review it was noted by @shipilev that the logging in arm fastlocking code is superfluous and can be removed.

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Commit messages:
 - JDK-8307869-Remove-unnecessary-log-statements-from-arm32-fastlocking-code

Changes: https://git.openjdk.org/jdk/pull/13922/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13922&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307869
  Stats: 9 lines in 3 files changed: 0 ins; 9 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13922.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13922/head:pull/13922

PR: https://git.openjdk.org/jdk/pull/13922