RFR: 8328745: Remove unused imports in system tests

[Andy Goryachev]

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


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This is a trivial change (though fairly large), 1 reviewer is probably enough.

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Commit messages:
 - 8328745: Remove unused imports in system tests

Changes: https://git.openjdk.org/jfx/pull/1419/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1419&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328745
  Stats: 853 lines in 89 files changed: 206 ins; 480 del; 167 mod
  Patch: https://git.openjdk.org/jfx/pull/1419.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1419/head:pull/1419

PR: https://git.openjdk.org/jfx/pull/1419