bug#4446: remove ###autoload from ediff-hook.el

[Stefan Monnier]

> I found that setting preloaded-file-list in bootstrap-emacs does not
> work anyway. At that stage files are being loaded uncompiled, so extra
> files (eg cl) end up being added to preloaded-file-list due to
> eval-when-compile.

> Anyway, here's an attempt at your suggestion. The final version
> probably should not print the "skipped" message.

That looks pretty good.  There's still a "minor" problem that
lisp/makefile.w32 also needs update.

BTW, now that I think about it: is it really necessary to skip those
files?  I mean, what is the impact of having such redundant autoloads in
loaddefs.el?


        Stefan