message: we do not need to set RUSTFLAGS for xargo any more as miri-as-rustc already uses these flags
diff: @@ -342,7 +342,6 @@ path = "lib.rs"
  command.env("RUSTC", find_miri());
  }
  command.env("MIRI_BE_RUSTC", "1");
  - command.env("RUSTFLAGS", miri::miri_default_args().join(" "));
  // Finally run it!
  if command.status().expect("failed to run xargo").success().not() {
  show_error(format!("Failed to run xargo"));
  