RFR: 8344146: Remove temporary font file tracking code.

[Phil Race]

The font data usage tracker only ever did anything if there was a SecurityManager installed and it restricted access to creating files.
Since there can no longer be a Security Manager this is completely dead code and should be removed.

-------------

Commit messages:
 - 8344146

Changes: https://git.openjdk.org/jdk/pull/22876/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22876&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344146
  Stats: 276 lines in 5 files changed: 0 ins; 262 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/22876.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22876/head:pull/22876

PR: https://git.openjdk.org/jdk/pull/22876