How do I remove the Swift flavor from an Xcode project?

I started an Xcode project (iOS app) as a mixed Objective-C and Swift project, but now I've decided that all I need is Objective-C. How do I convert it back to a regular Objective-C project?

As it is, one of the steps I see in the status bar when launching the app is "Copying Swift standard libraries". I don't want extra stuff in my app that I don't need. Thanks in advance.