RFR: 8253014: OopStorage bulk release logs entries multiple times

[Kim Barrett]

Please review this trivial change that removes some incorrect / duplicate
logging from OopStorage's bulk release operation.  The correct logging is
done about 10 lines later.

Testing: mach5 tier1.

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Commit messages:
 - remove excess logging

Changes: https://git.openjdk.java.net/jdk/pull/319/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=319&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253014
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/319.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/319/head:pull/319

PR: https://git.openjdk.java.net/jdk/pull/319