RFR: 8331879: Clean up non-standard use of /// comments in `java.base`

[xiaotaonan]

Clean up non-standard use of /// comments in `java.base`

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Commit messages:
 - Clean up non-standard use of /// comments in

Changes: https://git.openjdk.org/jdk/pull/19151/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19151&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331879
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19151.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19151/head:pull/19151

PR: https://git.openjdk.org/jdk/pull/19151