Fix 1.68 clippy warnings

src/platform/ios.rs

@@ -253,9 +253,10 @@ impl MonitorHandleExtIOS for MonitorHandle {
 }
 
 /// Valid orientations for a particular [`Window`].
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, Default)]
 pub enum ValidOrientations {
     /// Excludes `PortraitUpsideDown` on iphone
+    #[default]
     LandscapeAndPortrait,
 
     Landscape,
@@ -264,13 +265,6 @@ pub enum ValidOrientations {
     Portrait,
 }
 
-impl Default for ValidOrientations {
-    #[inline]
-    fn default() -> ValidOrientations {
-        ValidOrientations::LandscapeAndPortrait
-    }
-}
-
 /// The device [idiom].
 ///
 /// [idiom]: https://developer.apple.com/documentation/uikit/uidevice/1620037-userinterfaceidiom?language=objc