RFR: 8344443: Deprecate FXPermission for removal

[Kevin Rushforth]

This PR deprecates the FXPermission class for removal. The intent is to deprecate it in 24 and remove it in 26.

This class no longer does anything. Now that we have finished the post-SM removal cleanup, there are no remaining references FXPermission in JavaFX.

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Commit messages:
 - 8344443: Deprecate FXPermission for removal

Changes: https://git.openjdk.org/jfx/pull/1643/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1643&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344443
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1643.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1643/head:pull/1643

PR: https://git.openjdk.org/jfx/pull/1643