message: remove ICEin intrinsic
diff: @@ -217,8 +217,6 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
  this.write_immediate(*val, place.into())?;
  }
  - "breakpoint" => unimplemented!(), // halt miri
  -
  #[rustfmt::skip]
  | "copy"
  | "copy_nonoverlapping"
  