RFR: 8334305: Remove all code for nsk.share.Log verbose mode

[Ramkumar Sunderbabu]

Cleaning up nsk.share.Log code after the verbose mode was set always true.

Tested all the vmTestbase/ tests.

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

Commit messages:
 - 8334305: Remove all code for nsk.share.Log verbose mode

Changes: https://git.openjdk.org/jdk/pull/21267/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21267&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334305
  Stats: 127 lines in 13 files changed: 0 ins; 98 del; 29 mod
  Patch: https://git.openjdk.org/jdk/pull/21267.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21267/head:pull/21267

PR: https://git.openjdk.org/jdk/pull/21267