Remove another Keyguard special-case for SLEEP

As we send SLEEP with a delay now, Keyguard doesn't need
a get-out-of-SLEEP-free card.

Change-Id: I335fc7aa7f32e5d072d98012f1c69df659b21d38
Test: atest CtsWindowManagerDeviceKeyguard
Bug: 307664371
1 file changed