message: Fix clippy warnings unneeded returns
diff: @@ -229,7 +229,7 @@ pub fn start_instance(module: &Module, instance: &mut Instance, path: &str, args
  let (argc, argv) = store_module_arguments(path, args, instance);
  - return call_protected!(main(argc, argv, &instance)).map_err(|err| format!("{}", err));
  + call_protected!(main(argc, argv, &instance)).map_err(|err| format!("{}", err))
  // TODO: We should implement emscripten __ATEXIT__
  } else {
  let func_index =
  @@ -241,6 +241,6 @@ pub fn start_instance(module: &Module, instance: &mut Instance, path: &str, args
  });
  let main: extern "C" fn(&Instance) =
  get_instance_function!(instance, func_index);
  - return call_protected!(main(&instance)).map_err(|err| format!("{}", err));
  + call_protected!(main(&instance)).map_err(|err| format!("{}", err))
  }
  }
  