How to Delete Code: The Interface Story How to delete code, safely of course, is usually a major problem. Difficult and You always second guess every decision because You don’t know what You don’t know. It is not just hitting the “delete” button. You need to make a smart decision and second guess your solution. How to remove unnecessary code with a focus ? Refactor the code, use interfaces and then test it twice remembering about user experience. TL; DR 😉 Define one interface. Create two implementations – legacy, modern and any other. Unify! Use it in already existing services or create such services by refactoring code. Switch between them…