RFR: 8344114: Remove obsolete permission check methods from Font classes

[Lukasz Kostyra]

This PR removes obsolete permission check methods and fields from Font-related classes.

Verified the changes on Windows, did not see any regressions.

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Commit messages:
 - Cleanup unused security functions from Font classes

Changes: https://git.openjdk.org/jfx/pull/1659/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1659&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344114
  Stats: 56 lines in 5 files changed: 0 ins; 54 del; 2 mod
  Patch: https://git.openjdk.org/jfx/pull/1659.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1659/head:pull/1659

PR: https://git.openjdk.org/jfx/pull/1659