chore: drop v0.30 deprecated APIs

Co-authored-by: daxpedda <daxpedda@gmail.com>

src/window.rs

@@ -174,15 +174,6 @@ unsafe impl Send for SendSyncRawWindowHandle {}
 #[cfg(feature = "rwh_06")]
 unsafe impl Sync for SendSyncRawWindowHandle {}
 
-impl WindowAttributes {
-    /// Initializes new attributes with default values.
-    #[inline]
-    #[deprecated = "use `Window::default_attributes` instead"]
-    pub fn new() -> Self {
-        Default::default()
-    }
-}
-
 impl WindowAttributes {
     /// Get the parent window stored on the attributes.
     #[cfg(feature = "rwh_06")]
@@ -1433,13 +1424,6 @@ impl Window {
         self.window.maybe_queue_on_main(move |w| w.set_cursor(cursor))
     }
 
-    /// Deprecated! Use [`Window::set_cursor()`] instead.
-    #[deprecated = "Renamed to `set_cursor`"]
-    #[inline]
-    pub fn set_cursor_icon(&self, icon: CursorIcon) {
-        self.set_cursor(icon)
-    }
-
     /// Changes the position of the cursor in window coordinates.
     ///
     /// ```no_run