[OpenJDK 2D-Dev] RFR: 8272878: JEP 381 cleanup: Remove unused Solaris code in sun.font.TrueTypeGlyphMapper

[Daniel Gredler]

During the recent JEP 381 removal of Solaris code, a few Solaris-specific constants and private methods were left behind in sun.font.TrueTypeGlyphMapper. This PR removes these unused odds and ends.

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Commit messages:
 - JEP 381 cleanup: Remove unused Solaris code

Changes: https://git.openjdk.java.net/jdk/pull/5232/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5232&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272878
  Stats: 17 lines in 1 file changed: 0 ins; 17 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5232.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5232/head:pull/5232

PR: https://git.openjdk.java.net/jdk/pull/5232