Removal Of Code in Startup.cs

I have a quick suggestion. After cloning the project, and opening it in Visual Studio, I tried to run the sample. It came up with an error because the reference: **using BlazorApp.Data;** was not removed. Also there is a WeatherForecast service registered in the same startup file. Would you be able to remove these lines for future users?

Otherwise this is an awesome example. Thank you!