How do I uninstall Swiftify for Xcode?

Since Swiftify for Xcode integrates with Xcode and Finder through extensions, you must first quit Swiftify for Xcode, Xcode (if running), and Finder from the Force Quit Menu (Option + Command + Esc), as shown below.

Now you can move Swiftify for Xcode to the Trash folder, and you are done with the uninstallation.