diff --git a/Clocker/AppDelegate.swift b/Clocker/AppDelegate.swift
index a47a92f..ae37d4d 100644
--- a/Clocker/AppDelegate.swift
+++ b/Clocker/AppDelegate.swift
@@ -40,9 +40,6 @@ open class AppDelegate: NSObject, NSApplicationDelegate {
     }
 
     public func applicationDidFinishLaunching(_: Notification) {
-        // Required for migrating our model type to CoreModelKit
-        NSKeyedUnarchiver.setClass(CoreModelKit.TimezoneData.classForKeyedUnarchiver(), forClassName: "Clocker.TimezoneData")
-
         AppDefaults.initialize(with: DataStore.shared(), defaults: UserDefaults.standard)
 
         // Check if we can show the onboarding flow!