bug#70215: Documentation about uninstalling

[Rostislav Svoboda]

> ./guix-install.sh --uninstall
> [...]
> That sounds dangerous

Yeah a bit.

> -- what about putting all the deletions
> in a TAR_DICT/TAR_FILE_NAME.tgz as a default, with suitable
> default alternative commands for various capitalized names
> in a (bash) select menu -- which could also include
>     "Just do it, I know what --uninstall does")

Eeeh? I don't understand what you mean.

Nevertheless, `./guix-install.sh --dry-run --uninstall` would be nice.
However the script is over 800 lines long. In bash! :-(
IMO before increasing script complexity with a new feature, we should
rewrite it to some reasonable language, preferably Guile Scheme. Or at
least Python.

Cheers Bost