Fix clippy::needless_lifetimes lints (#717)

* Fix `clippy::needless_lifetimes` lints

* Fix `clippy::doc_markdown` lints

core-graphics/src/event.rs

@@ -47,8 +47,8 @@ bitflags! {
 ///
 /// These constants are the virtual keycodes defined originally in
 /// Inside Mac Volume V, pg. V-191. They identify physical keys on a
-/// keyboard. The struct contains the values of the ANSIKeyCode,
-/// KeyCode, ISOKeyCode and JISKeyCode of the original Carbon headers.
+/// keyboard. The struct contains the values of the `ANSIKeyCode`,
+/// `KeyCode`, `ISOKeyCode` and `JISKeyCode` of the original Carbon headers.
 ///
 /// Those constants with "ANSI" in the name are labeled
 /// according to the key position on an ANSI-standard US keyboard.

core-graphics/src/path.rs

@@ -80,7 +80,7 @@ pub struct CGPathElementRef<'a> {
     phantom: PhantomData<&'a CGPathElement>,
 }
 
-impl<'a> CGPathElementRef<'a> {
+impl CGPathElementRef<'_> {
     fn new<'b>(element: *const CGPathElement) -> CGPathElementRef<'b> {
         CGPathElementRef {
             element,
@@ -89,7 +89,7 @@ impl<'a> CGPathElementRef<'a> {
     }
 }
 
-impl<'a> Deref for CGPathElementRef<'a> {
+impl Deref for CGPathElementRef<'_> {
     type Target = CGPathElement;
     fn deref(&self) -> &CGPathElement {
         unsafe { &*self.element }