Re: when do we remove backward compatibility definitions?

[Paul Eggert]

Sam Steingold wrote:
> these seem clear-cut:
>
> mail/sendmail.el:(make-obsolete-variable 'mail-yank-hooks 'mail-citation-hook 
> "19.34")
> mh-e/mh-letter.el(mh-make-obsolete-variable 'mh-yank-hooks 'mail-citation-hook 
> "19.34")

Yes, removing those makes sense.

> these are more controversial:
>
> select.el:
> ;; Only declared obsolete in 23.3.
> (define-obsolete-function-alias 'x-selection 'x-get-selection "at least 19.34")

Since this wasn't declared obsolete until 23.3 and 23.1 is still used enough, 
I'd leave it in for now.

> subr.el:
> ;; Lisp manual only updated in 22.1.
> (define-obsolete-variable-alias 'executing-macro 'executing-kbd-macro
>    "before 19.34")

22.1 is old enough so that alias can go, if you ask me.