RFR: 8276218: JFR: Clean up jdk.jfr.dcmd

[Erik Gahlin]

Hi,

Could I have a review of a fix that removed an unessary field and System.out.println statement that should be there.

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.java.net/jdk/pull/6183/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6183&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276218
  Stats: 3 lines in 2 files changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6183.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6183/head:pull/6183

PR: https://git.openjdk.java.net/jdk/pull/6183