RFR: 8343479: Remove unnecessary @SuppressWarnings annotations (hotspot) [v2]

[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 four additional commits since the last revision:

 - Update copyright years.
 - Merge branch 'master' into SuppressWarningsCleanup-hotspot
 - Merge branch 'master' into SuppressWarningsCleanup-graal
 - Remove unnecessary @SuppressWarnings annotations.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21853/files
  - new: https://git.openjdk.org/jdk/pull/21853/files/8eab41ca..21c83e93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21853&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21853&range=00-01

  Stats: 592 lines in 18 files changed: 420 ins; 93 del; 79 mod
  Patch: https://git.openjdk.org/jdk/pull/21853.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21853/head:pull/21853

PR: https://git.openjdk.org/jdk/pull/21853