Revert "Add LockSupport.park to 004-ThreadStress"

This reverts commit 91587ea543d42e05975f16f9dc7720d47f5cd75d.

Reason for revert: Creates timeouts in automated testing.

Bug: 119017401
Change-Id: I0e0217d30b564d8224d73a381a34ca5394f3128c
1 file changed