bug#13602: 24.3.50; remove bindings for `icomplete-minibuffer-map' - make a separate mode

[Jambunathan K]

>> These bindings mimic the behaviour of ido-mode.
>
> Yes, I know.  (Actually, it is Ido that mimicked Icomplete and IswitchB.)
>
> If you want Ido then you do not really need Icomplete anyway.

Are you saying: "ido can do what Icomplete does *without* the user
modifying any of the completing-read calls in existing libraries?".

I remember modifying `completing-read-function' at some point in time.