removes unused define

I was thinking about standardizing around this to be able to make like
a generic plugin resource you could wrap up, but it's seeming like the
plugins should almost be separate modules anyways, so I dunno.

either way, this is cruft
generate the config entirely using datacat

seems that the erb running during datacat's template evaluation isn't as
handy as the erb running on the master and doesn't have json. hopefully
it has yaml or I'm pretty much boned, here