In #1388 the cheating strategies were removed as well as a bunch of functionality for them in `strategy_utils.py`. These are "historic" to the library and nice fun. I believe there are two options for where we put them: 1. In a separate python library (`import axelrod-cheaters`). 2. In a module that does not import them directly, so that a user has to specifically go get them if they want them (`import axelrod.cheaters`)