RFR: 8325221: Obsolete TLABStats

[Albert Mingkun Yang]

Simple obsoletion of a jvm flag.

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

Commit messages:
 - obsolete

Changes: https://git.openjdk.org/jdk/pull/17707/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325221
  Stats: 7 lines in 4 files changed: 1 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17707.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17707/head:pull/17707

PR: https://git.openjdk.org/jdk/pull/17707