RFR: 8328742: Remove unused imports in manual tests

[Andy Goryachev]

Using Eclipse IDE to remove unused imports in **manual tests** and update the copyright year to 2024. Using wildcard for more than 10 static imports.

**PROBLEM**
The code in `graphics/build/gensrc/jsl-decora/` is generated and cannot be fixed.
This means this warning **must be suppressed** in IDEs until the generator script is changed not to emit unused imports.

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This is a trivial change, 1 reviewer is probably enough.

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Commit messages:
 - undo unrelated change
 - 8328742: Remove unused imports in manual tests

Changes: https://git.openjdk.org/jfx/pull/1418/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1418&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328742
  Stats: 130 lines in 14 files changed: 35 ins; 68 del; 27 mod
  Patch: https://git.openjdk.org/jfx/pull/1418.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1418/head:pull/1418

PR: https://git.openjdk.org/jfx/pull/1418