Revert "DeskClock: Fix crash when click the dismiss in the notification"

This reverts commit 5cba463b982845622a2a403282b67550cdac31c8.
Revert "DeskClock: Request user to confirm power-on device on power-off alarm event"

This reverts commit a4b3205cf7ad63e6beef1f0222c34d65f26b3b7a.