RFR: 8376433: Remove AppContext from Swing Windows L&F implementation

[Phil Race]

Remove AppContext from the Windows L&F implementation

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Commit messages:
 - 8376433

Changes: https://git.openjdk.org/jdk/pull/29440/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29440&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376433
  Stats: 66 lines in 6 files changed: 0 ins; 51 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/29440.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29440/head:pull/29440

PR: https://git.openjdk.org/jdk/pull/29440