RFR: 8265314: Obsolete the unused AssertOnSuspendWaitFailure and TraceSuspendWaitFailures flags

[David Holmes]

The AssertOnSuspendWaitFailure and TraceSuspendWaitFailures flags became unused with the changes in JDK-8223312 and should have been obsoleted then. 

Thanks,
David

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Commit messages:
 - 8265314: Obsolete the unused AssertOnSuspendWaitFailure and TraceSuspendWaitFailures flags

Changes: https://git.openjdk.java.net/jdk/pull/3527/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3527&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265314
  Stats: 8 lines in 2 files changed: 2 ins; 6 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3527.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3527/head:pull/3527

PR: https://git.openjdk.java.net/jdk/pull/3527