Looks like we need a more-specific version of [Graph.removeEdge()](https://github.com/noflo/noflo/blob/db95c95152a6001adcd901dce3a4227259c9d9bb/src/lib/Graph.coffee#L495-L527) for edges with index. (moved from https://github.com/noflo/noflo/issues/254)
Looks like we need a more-specific version of Graph.removeEdge() for edges with index.
(moved from noflo/noflo#254)