No need to re-bind registry channels

[JoshOrndorff]

rhobust/rhobustCaller.rho

Lines 29 to 30 in 8423b87

	ri(`rho:registry:insertArbitrary`),
	rl(`rho:registry:lookup`) in {

looks like a good start. Just a pointer, since you've already bound those registry channels at the topmost level, you don't need to bind them again.