message: remove intrinsic that is now implemented in the rustc side
diff: @@ -443,11 +443,6 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
  this.exact_div(this.read_immediate(num)?, this.read_immediate(denom)?, dest)?;
  }
  - "forget" => {
  - // We get an argument... and forget about it.
  - let &[_] = check_arg_count(args)?;
  - }
  -
  "try" => return this.handle_try(args, dest, ret),
  name => throw_unsup_format!("unimplemented intrinsic: {}", name),
  