-source:3.4-migration -rewrite should remove empty argument list for class with only context bounds

[WojciechMazur]

Compiler version

All Scala 3+

Minimized code

trait Effect[F[_]]
class Countdown[F[_]: Effect]

@main def Test = new Countdown[Option]()(???)

Output

trait Effect[F[_]]
class Countdown[F[_]: Effect]

@main def Test = new Countdown[Option]()(using ???)

> scala-cli compile test.scala -S 3.5              
[error] ./test.scala:13:22
[error] Context bounds will map to context parameters.
[error] A `using` clause is needed to pass explicit arguments to them.
[error] This code can be rewritten automatically under -rewrite -source 3.4-migration.
[error] @main def Test = new Countdown[Option]()(using ???)

Expectation

The legacy (Scala 2) empty argument list should be removed when performing automatic rewrite