Revert "[BUG] ActorProxy doesn't respond_to respond_to? correctly"
Revert "[BUG] ActorProxy doesn't respond_to respond_to? correctly"

This reverts commit 45beb53d35f4fc8da7df9e7d9d84f04d26e5eb4b.

This broke the entire test suite so none of the other tests even run o_O

/cc @benlangfeld

celluloid/celluloid,kenichi/celluloid,jasonm23/celluloid,jstoja/celluloid,seuros/celluloid,mehta/celluloid,sideci-sample/sideci-sample-celluloid,marshall-lee/celluloid,davydovanton/celluloid,dilumn/celluloid,TiagoCardoso1983/celluloid,olleolleolle/celluloid