RFR: 8274282: Clarify special wait assert [v5]

[Coleen Phillimore]

> This change removes the assert and tests for Mutex::wait() only allowed with greater than nosafepoint ranked held locks.
> Tested with tier1-3.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Fix grammar in comment.

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5684/files
  - new: https://git.openjdk.java.net/jdk/pull/5684/files/5d988cdf..14d95829

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5684&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5684&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5684.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5684/head:pull/5684

PR: https://git.openjdk.java.net/jdk/pull/5684