No, I'm afraid the game doesn't include any cheats. And, considering that the police and other enemies are there to hinder you and prevent you from getting money, removing them would remove all difficulty from the game. The only thing is that every time you interact with a client, the game gives you a random buff or debuff, like temporarily increasing your movement speed or doubling the money you earn. Well, one of the advantages is to remove a policeman from the game.