I found an app to get rid of Power Saver in notification shade

I just go to Settings > Apps > Power and Force Stop the app. Same functionality.

Sent from my HTC One M9 on Tapatalk
 
I just go to Settings > Apps > Power and Force Stop the app. Same functionality.

Sent from my HTC One M9 on Tapatalk

Hmmmm...You're right. I didn't realize it was that simple. I would have done it a long time ago. I guess the only advantage this has is fewer steps. Widget>force stop.