message: remove inadequate comment
diff: @@ -119,9 +119,6 @@ fn direct_mut_to_const_raw() {
  // Make sure that we can create two raw pointers from a mutable reference and use them both.
  fn two_raw() { unsafe {
  let x = &mut 0;
  - // Given the implicit reborrows, the only reason this currently works is that we
  - // do not track raw pointers: The creation of `y2` reborrows `x` and thus pops
  - // `y1` off the stack.
  let y1 = x as *mut _;
  let y2 = x as *mut _;
  *y1 += 2;
  