Remove test-source run function
Remove test-source run function

I needed that for a while when the IDE test plugin was broken, but I
don’t think I’ll be needing that again: It’s highly unlikely that the
CLI plugin and the IDE plugin break at the same time, and if they do,
it’s probably a bug in the ceylon.test modules and this run function
won’t work either.

HenningB/ceylon.formatter