RFR: 8343478: Remove unnecessary @SuppressWarnings annotations (core-libs) [v3]

[Archie Cobbs]

> Please review this patch which removes unnecessary `@SuppressWarnings` annotations.

Archie Cobbs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:

 - Merge branch 'master' into SuppressWarningsCleanup-core-libs
 - Update copyright years.
 - Remove a few more @SuppressWarnings annotations.
 - Remove a few more @SuppressWarnings annotations.
 - Update copyright years.
 - Merge branch 'master' into SuppressWarningsCleanup-core-libs
 - Merge branch 'master' into SuppressWarningsCleanup-core-libs
 - Remove unnecessary @SuppressWarnings annotations.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21852/files
  - new: https://git.openjdk.org/jdk/pull/21852/files/7842dfea..a64d5594

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21852&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21852&range=01-02

  Stats: 131613 lines in 758 files changed: 103986 ins; 9698 del; 17929 mod
  Patch: https://git.openjdk.org/jdk/pull/21852.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21852/head:pull/21852

PR: https://git.openjdk.org/jdk/pull/21852