RFR: 8343482: Remove unnecessary @SuppressWarnings annotations (net) [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-net
 - Merge branch 'master' into SuppressWarningsCleanup-net
 - Remove unnecessary @SuppressWarnings annotations.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21856/files
  - new: https://git.openjdk.org/jdk/pull/21856/files/03c794c1..bbe4fe07

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21856&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21856&range=00-01

  Stats: 3226 lines in 124 files changed: 2078 ins; 749 del; 399 mod
  Patch: https://git.openjdk.org/jdk/pull/21856.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21856/head:pull/21856

PR: https://git.openjdk.org/jdk/pull/21856