Use recently stabilized intra-doc links

See RFC: https://github.com/rust-lang/rfcs/blob/master/text/1946-intra-rustdoc-links.md

winit/src/clipboard.rs

@@ -5,8 +5,6 @@ pub struct Clipboard(window_clipboard::Clipboard);
 
 impl Clipboard {
     /// Creates a new [`Clipboard`] for the given window.
-    ///
-    /// [`Clipboard`]: struct.Clipboard.html
     pub fn new(window: &winit::window::Window) -> Option<Clipboard> {
         window_clipboard::Clipboard::new(window).map(Clipboard).ok()
     }