It was never used in the recent history.

* format with nixpkgs-fmt
* drop unneeded dependencies
    * gnome-doc-utils → yelp-tools since 3.6.0
    * intltool → gettext since 3.16.2
* move build-time deps to nativeBuildInputs
* add metadata

It is a runtime dependency that produces dependency loop:

    anytree → graphviz → pango → glib → gtk-doc → anytree

* use buildPythonApplication instead of symlinking
   * but do not propagate Python
* Add lxml & anytree for gtkdoc-mkhtml2

We are dropping Python support from gamin so nothing is holding us any more.
Instead of gamin, we will use systemd on Linux and polling on Darwin;
gamin is the worst backend any way, according to upstream:

fail2ban/fail2ban#1330 (comment)

They are not compatible with Python 3, upstream as dead, and nothing uses the bindings any more.

This is a progress in getting rid of Python 2 from closures of most people (samba, which depends on gamin shared library is common dependency).

Python is only used for a single console test these dayls and it likely requires
non-trivial introspection hacks.

Also move the build-time dependencies to nativeBuildInputs, and drop perl as it no longer seems to be necessary (CMake is not looking for it any more).

Nothing was using them.

Another step in Python 2 removal.

This improves build times significantly, from 20min to 9min on the
aarch64 community box.

Borrowing fedora's 2to3 trick:
https://src.fedoraproject.org/rpms/GConf2/blob/master/f/GConf2.spec#_90

(thank you, worldofpeace!)

We recently defaulted fontforge to python3 which made the python2 used by the build system unable to find fontforge.

Update, clean up and also fix build.

Part of the build system still does not support Python 2:

hakatashi/RictyDiminished-with-FiraCode#3

Fix services.xserver.extraLayouts under GNOME 3