Remove the blanket implementation for reference of Automaton

[momvart]

Fixes #149

[momvart]

(As removing the implementation is presumably a breaking change, I put it in a separate commit so you have an easier job not merging it.)

[BurntSushi]

The main thing preventing merging here is a manual inspection of cargo bloat (or similar tool) to confirm that there aren't extra copies of the internal search routines.

[momvart]

The main thing preventing merging here is a manual inspection of cargo bloat (or similar tool) to confirm that there aren't extra copies of the internal search routines.

I see. If you can give me some instructions on what data you want to collect, I can help with it.