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

[Stefan Monnier]

>> > The ###autoload in ediff-hook.el is not needed
>> [...]
>> > OK to remove the autoload line?
>> 
>> The last time this question was asked, the ediff maintainer asked for
>> it not to be removed:
>> 
>> http://lists.gnu.org/archive/html/emacs-devel/2008-03/msg00896.html

> Hmm, I forgot about this.
> But removing a single line in a file that hardly ever changes does not
> seem like a bit maintenance burden.

That's only because Michael is the only maintainer who stood strong.
Many other preloaded files would be happy to keep
their ;;;###autoload cookies.  They're a form of documentation and make
it easier to switch back&forth between preloaded and non-preloaded.

> On the other hand the autoload adds ~10KB to all emacs downloads, plus a
> few symbols that are defined and never ever used (but need to be GCed
> every single time for ALL users).

That's why those cookies should be skipped for preloaded files.


        Stefan