Revert "rwsem: Implement writer lock-stealing for better scalability"

This reverts commit 2b86eabd29b610a359a67f63ba03e7b0148c171c.
Revert "rwsem-spinlock: Implement writer lock-stealing for better scalability"

This reverts commit 83ee9f5247a4627079339b7217430e6f1a169e94.