Don't swizzle unnecessarily on iOS 17

Tusker/AppDelegate.swift

@@ -198,7 +198,11 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         }
     }
     
+    @available(iOS, obsoleted: 17.0)
     private func swizzlePresentationController() {
+        guard #unavailable(iOS 17.0) else {
+            return
+        }
         var originalIMP: IMP?
         let imp = imp_implementationWithBlock({ (self: UIPresentationController) in
             let new = UITraitCollection(pureBlackDarkMode: self.presentingViewController.traitCollection.pureBlackDarkMode)