RFR: 8259809: Remove PerfEvent class loading locking counters

[Coleen Phillimore]

See CR for details.
Tested with tier1-3.

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Commit messages:
 - 8259809: Remove PerfEvent class loading locking counters

Changes: https://git.openjdk.java.net/jdk/pull/2227/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2227&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259809
  Stats: 163 lines in 8 files changed: 0 ins; 162 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2227.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2227/head:pull/2227

PR: https://git.openjdk.java.net/jdk/pull/2227