oldmap: get rid of legacy _ref suffixes

src/test/bench/shootout-k-nucleotide-pipes.rs

@@ -49,7 +49,7 @@ fn sort_and_fmt(mm: HashMap<~[u8], uint>, total: uint) -> ~str {
    let mut pairs = ~[];
 
    // map -> [(k,%)]
-   for mm.each_ref |&key, &val| {
+   for mm.each |&key, &val| {
       pairs.push((key, pct(val, total)));
    }
 

src/test/bench/shootout-mandelbrot.rs

@@ -134,7 +134,7 @@ fn writer(path: ~str, pport: pipes::Port<Line>, size: uint)
             done += 1_u;
             let mut prev = done;
             while prev <= i {
-                if lines.contains_key_ref(&prev) {
+                if lines.contains_key(&prev) {
                     debug!("WS %u", prev);
                     cout.write(lines.get(&prev));
                     done += 1_u;