Where exactly is the fast boot option?

[AC Question]

I own a HTC M8
Its currently updating to Android 6 Marshmallow
I cannot find the fast boot option for [language edited by Mod]
Ive been all over settings, but cant find it
I remember selecting fast boot when i first got my phone, so I dont want to have to reset my phone just to unselect it.
Any help?

 

[B. Diddy]

Moved to the M8 forum.

 

[IAmSixNine]

I believe the fastboot option was removed.