Merge pull request #227 from gwilymk/fix-new-clippy-lint

Remove pointless 'a

agb/src/hash_map.rs

@@ -530,7 +530,7 @@ where
     }
 }
 
-impl<'a, K, V> HashMap<K, V>
+impl<K, V> HashMap<K, V>
 where
     K: Hash + Eq,
 {

examples/the-hat-chooses-the-wizard/src/main.rs

@@ -607,7 +607,7 @@ enum UpdateState {
     Complete,
 }
 
-impl<'a, 'b, 'c> PlayingLevel<'a, 'b> {
+impl<'a, 'b> PlayingLevel<'a, 'b> {
     fn open_level(
         level: &'a Level,
         object_control: &'a ObjectController,