Rules for cleaning up case from switch statements of variables in an enum

[Satyam1749]

This PR contains rule to cleanup any enum entry from all the variables in that enum. In swift, we use switch in enums to populate computed properties. These rules aims to cleanup any enum entry from all such variables.

example:
Before

enum TestEnum {
   case one
   case two
   case three

   var v1: String {
      switch self {
      case .one:
         return "one"
      case .two:
         return "two"
      case .three:
         return "three"
      }
   }
}

After

enum TestEnum {
   case two
   case three

   var v1: String {
      switch self {
      case .two:
         return "two"
      case .three:
         return "three"
      }
   }
}

case one should be cleaned up by a custom rule which needs to belong to group enum_entry_cleanup, This will cleanup entry of case one from var v1.

[ketkarameya]

I guess after #410 is merged, the limitation would no longer exist.
But it also implies that you might have to update the PR to not use the hack.

[ketkarameya]

Did my fix in 410 not work?

[ketkarameya]

We no longer need this right?