unnecessary_await_in_return

Unnecessary await keyword in return.

This rule is available as of Dart 2.1.1.

Avoid returning an awaited expression when the expression type is assignable to the function's return type.

BAD:

Future<int> future;
Future<int> f1() async => await future;
Future<int> f2() async {
  return await future;
}

GOOD:

Future<int> future;
Future<int> f1() => future;
Future<int> f2() {
  return future;
}

To enable the unnecessary_await_in_return rule, add unnecessary_await_in_return under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - unnecessary_await_in_return