Re: Removing unloaded functions from auto-mode-alist.

[Richard Stallman]

      I am at the moment just
    concerned with creating a setup where Emacs packagers would have no
    qualms enabling AUCTeX as the default mode by preloading "auctex.el"
    (to be created).  And this goal can be achieved if (unload-feature
    'auctex) or something similar will remove it again.

There would be no need for something as drastic as using unload-feature.
If there is a user option to select between AUCTeX and the standard
TeX modes, a user who wants the latter just has to set the option.

      Psychologically however, (setq AUCTeX-modes nil) means that
    you have to beg AUCTeX to be gone, whereas (unload-feature 'AUCTeX)
    commands it to be gone.

I don't see why a user would care which, as long as it has the same
practical result: to use the standard TeX modes.