RFR: 8282188: Unused static field MathContext.DEFAULT_DIGITS

[Andrey Turbanov]

8282188: Unused static field MathContext.DEFAULT_DIGITS

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Commit messages:
 - [PATCH] Remove unused field MathContext.DEFAULT_DIGITS

Changes: https://git.openjdk.java.net/jdk/pull/7538/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7538&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282188
  Stats: 6 lines in 1 file changed: 0 ins; 5 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7538.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7538/head:pull/7538

PR: https://git.openjdk.java.net/jdk/pull/7538