bug#14197: 24.3.50; remove `kmacro-bind-to-key' prefix arg

[Lars Ingebrigtsen <larsi@gnus.org>]

"Drew Adams" <drew.adams@oracle.com> writes:

> `kmacro-bind-to-key' has _ARG as a required argument.  Interactively
> it is the numeric prefix argument.
>
> Presumably this is an internal argument, based on the name.
> But it is used nowhere in the code, AFAICT - not in
> `kmacro-bind-to-key' or in any other code delivered with Emacs.
>
> If it is really useless, as it seems, then remove it, including from
> `interactive'.  (Or if it is really useful somehow, describe it in the doc
> string.)

The ARGs aren't used, as far as I can see.  And since the doc strings
don't automatically say that _arg is unused, I've added this.

But perhaps the docstring stuff should say this automatically for _arg
parameters?

-----------

kmacro-cycle-ring-next is an interactive compiled Lisp function in
`kmacro.el'.

It is bound to C-x C-k C-n.

(kmacro-cycle-ring-next &optional ARG)

Move to next keyboard macro in keyboard macro ring.
Displays the selected macro in the echo area.

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