how do I get rid of unlock button while I'm on a call?

Seriously, this is the most insanely annoying addition to Android in marshmallow.
When I'm making a call now, I have to swipe unlock to use the keypad. "swipe unlock icon to use call options"
I want this off my phone.
Can someone please help me turn this off? It makes me want to throw my phone out the window.

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