RFR: 8276128: (bf) Remove unused constant ARRAY_BASE_OFFSET from Direct-X-Buffer

[Brian Burkhalter]

Please consider this minor change which would dispense with a vestigial constant.

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

Commit messages:
 - 8276128: (bf) Remove unused constant ARRAY_BASE_OFFSET from Direct-X-Buffer

Changes: https://git.openjdk.java.net/jdk/pull/6163/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6163&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276128
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6163.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6163/head:pull/6163

PR: https://git.openjdk.java.net/jdk/pull/6163