Remove DepNodeIndexNew::new and ::index, they are already impl for Idx

Author: spastorino

src/librustc/dep_graph/graph.rs

@@ -569,28 +569,20 @@ pub(super) struct DepNodeIndexNew {
 }
 
 impl Idx for DepNodeIndexNew {
-    fn new(idx: usize) -> Self {
-        DepNodeIndexNew::new(idx)
+    fn new(v: usize) -> DepNodeIndexNew {
+        assert!((v & 0xFFFF_FFFF) == v);
+        DepNodeIndexNew { index: v as u32 }
     }
+
     fn index(self) -> usize {
-        self.index()
+        self.index as usize
     }
 }
 
 impl DepNodeIndexNew {
-
     const INVALID: DepNodeIndexNew = DepNodeIndexNew {
         index: ::std::u32::MAX,
     };
-
-    fn new(v: usize) -> DepNodeIndexNew {
-        assert!((v & 0xFFFF_FFFF) == v);
-        DepNodeIndexNew { index: v as u32 }
-    }
-
-    fn index(self) -> usize {
-        self.index as usize
-    }
 }
 
 #[derive(Clone, Debug, PartialEq)]