Remove unused ByteString::bytes() and its unit test.

components/script/dom/bindings/str.rs

@@ -8,7 +8,6 @@ use std::ascii::AsciiExt;
 use std::borrow::ToOwned;
 use std::fmt;
 use std::hash::{Hash, Hasher};
-use std::mem;
 use std::ops;
 use std::ops::{Deref, DerefMut};
 use std::str;
@@ -31,12 +30,6 @@ impl ByteString {
         str::from_utf8(&self.0).ok()
     }
 
-    /// Returns ownership of the underlying Vec<u8> and copies an empty
-    /// vec in its place
-    pub fn bytes(&mut self) -> Vec<u8> {
-        mem::replace(&mut self.0, Vec::new())
-    }
-
     /// Returns the length.
     pub fn len(&self) -> usize {
         self.0.len()