Those are unmaintained, are broken, don't compile, or a combination of
all. Sadly there hasn't been enough manpower during the last years to
keep those up to par. Future seems shiny enough for nautilus, as the
features are being developed in-tree.

If anyone ever remembers there were such plugins and misses them
enough to take over maintainership, by all means reset to the parent
of this commit and take those out of tree. You will have my gratitude.

Thanks too to everyone who ever contributed in those plugins, I'm
not happy to let that much work go.