Is it same as changing Provisioning Profile from "Automatic" to a specific profile.
How do I disable "Automatic manage signing" in Xcode 7?
(Target)/General/Signing/[ √ ] Automatically manage code signing - click the √ to remove and disable
This will allow manual code signing and your choice of (compatible) profile. Might help to also perform an option-clean build folder as part of the change.
To better answer your quesiton, tho, it might help for you to explain why you want to disable amcs.
In the mean time, see: Signing Your Code Manually