Disable passcode grayed out.

So I just got a armband case for running and am trying to figure out how I could unlock my iPhone 6+ temporarily. The armband has a screen over it that doesn't allow the fingerprint to work. It would also be really tough to enter the passcode every time I want to check my phone. I removed my Apple Pay card thinking that would let me disable the passcode but it didn't. Any suggestions would help. Thanks!

 

I do. That makes sense. Thanks. I can't really take my work email off so I'll have to figure something else out.