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Remove the redundant synchronisation in the request queue of the CPU time profiler.

causes

JDK-8370647 TestCPUTimeSampleQueueAutoSizes.java trigger error: malloc(): invalid size (unsorted)

JDK-8370664 Test jdk/jfr/event/profiling/TestCPUTimeSampleQueueAutoSizes.java crashes after JDK-8366240

relates to

JDK-8370680 [REDO] Improve memory ordering in new CPU Time Profiler

JDK-8358616 Clarify the requirements and exact the memory ordering in CPU Time Profiler

links to

Commit(master) openjdk/jdk/b7a4c9ce

Review(master) openjdk/jdk/26960

(1 links to)