RFR: 8198336: java/awt/FontMetrics/FontCrash.java fails in headless mode

[Phil Race]

The code this test exercises is very obsolete. So this removes the test that triggers it along with that code.

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Commit messages:
 - 8198336: java/awt/FontMetrics/FontCrash.java

Changes: https://git.openjdk.java.net/jdk/pull/6027/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6027&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8198336
  Stats: 92 lines in 5 files changed: 0 ins; 92 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6027.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6027/head:pull/6027

PR: https://git.openjdk.java.net/jdk/pull/6027