Rule Request: Redundant `final` for `actor`s

[akuzminskyi]

New Issue Checklist

• Updated SwiftLint to the latest version
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New Rule Request

actors in Swift already final by default. but developers still sometimes write it as final actor and it doesn't produce any compiler warnings. But basically final is redundant in this case. similar to internal ACL.

I don't see any configuration for the rule. and I think it should be enabled by default as it doesn't change "logic".

final actor DataStorage {

->

actor DataStorage {

https://github.com/swiftlang/swift-evolution/blob/main/proposals/0306-actors.md#actors-2

hey are reference types like classes, but do not support inheritance, and therefore do not have (or need) features such as required and convenience initializers, overriding, or class members, open and final.