RFR: 8273611: Remove unused ProfilePrint_lock

[Coleen Phillimore]

Remove a lock that's no longer used.  Tested with local build.

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Commit messages:
 - remove stray comment
 - 8273611: Remove unused ProfilePrint_lock

Changes: https://git.openjdk.java.net/jdk/pull/5474/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5474&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273611
  Stats: 4 lines in 2 files changed: 0 ins; 3 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5474.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5474/head:pull/5474

PR: https://git.openjdk.java.net/jdk/pull/5474