<Swing Dev> RFR: 8260343: Delete obsolete classes in the Windows L&F

[Sergey Bylokhov]

Obsolete/unused classes are removed.

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Commit messages:
 - Initial fix

Changes: https://git.openjdk.java.net/jdk/pull/2216/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2216&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260343
  Stats: 151 lines in 3 files changed: 48 ins; 86 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2216.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2216/head:pull/2216

PR: https://git.openjdk.java.net/jdk/pull/2216