Remove Deprecated UIAlertView

[regnerjr]

UIAlert View is used in a few places in our app. Since This has been deprecated, we should remove these and move to a new more modern UIAlertController

The warnings show exactly where the issues are.
They are all in UIViewController+Alerts.m

Looks like the "Offenders" are all in an if else block providing a "Fallback Behavior".
Since our app just supports the latest version of iOS there's no reason to keep this code around.

Let's remove the if else check and just leave the UIAlertController code.

Also:
Looks like there is a SimpleTextPromptDelegate that will then be unused. Let's remove this as well.