static_map: remove starnge type borrow

src/static_map.rs

@@ -1,25 +1,19 @@
-use std::borrow::Borrow;
-
 #[derive(Debug)]
 pub struct StaticMap<'a, K, V> {
     pub entries: &'a [(K,V)],
 }
 
-impl<'a, K, V> StaticMap<'a, K, V>
-    where K: Eq {
+impl<'a, K: Eq, V> StaticMap<'a, K, V> {
 
     #[inline]
     pub fn len(&self) -> usize {
         self.entries.len()
     }
 
-    pub fn get<Q>(&self, key: &Q) -> Option<&V>
-        where K: Borrow<Q> + std::cmp::PartialEq<Q>,
-              Q: Eq {
+    pub fn get(&self, key: &K) -> Option<&V> {
         for (ref k, ref v) in self.entries {
             if k == key { return Some(v) }
         }
-
         None
     }
 }