RFR: 8274051: remove supports_vtime()

[Lei Zaakjyu]

8274051: remove supports_vtime()

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Commit messages:
 - remove 'supports_vtime'

Changes: https://git.openjdk.org/jdk/pull/17125/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17125&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8274051
  Stats: 10 lines in 4 files changed: 0 ins; 9 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17125.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17125/head:pull/17125

PR: https://git.openjdk.org/jdk/pull/17125