Revert "rcu: Add RCU_FAST_NO_HZ tracing for idle exit"

This reverts commit 3e8bf93a51bc8cc3d2e4d2c2ee28c2f039bd0e9c.
Revert "rcu: Add a module parameter to force use of expedited RCU primitives"

This reverts commit 4d49a4dc26ef6151f035df2987eaf98a248a68f6.