Well, another way to look at it is that you've improved 2000 lines of code. That is, you have touched 2000 lines of code and modified them in a way that makes t

Well, another way to look at it is that you've improved 2000 lines of code. That is, you have touched 2000 lines of code and modified them in a way that makes the software better. Yes, you did delete all of them, but as a professional expert you've discovered that these 2000 lines serve the project better when not existing. Then, you wrote another 1000 lines of fresh code. In the end, you've achieved a net betterment worth 3000 lines of code.