Remove commented-out code

src/proto/streams/buffer.rs

@@ -92,13 +92,4 @@ impl Deque {
             None => None,
         }
     }
-
-    /*
-    pub fn peek_front<'a, T>(&self, buf: &'a Buffer<T>) -> Option<&'a T> {
-        match self.indices {
-            Some(idxs) => Some(&buf.slab[idxs.head].value),
-            None => None,
-        }
-    }
-    */
 }