event_loop: remove deprecated run APIs

The APIs are not well suited for the `&dyn ApplicationHandler` model and
`Box<dyn EventLoop>` structure, thus remove them.

src/changelog/v0.30.md

@@ -65,7 +65,7 @@
   `Fn`. The semantics are mostly the same, given that the capture list of the
   closure is your new `State`. Consider the following code:
 
-  ```rust,no_run
+  ```rust,no_run,ignore
   use winit::event::Event;
   use winit::event_loop::EventLoop;
   use winit::window::Window;