unused-parameter rule should not trigger on override functions

[sindresorhus]

New Issue Checklist

• I've Updated SwiftLint to the latest version.
• I've searched for existing GitHub issues.

Bug Description

override function have to perfectly match the superclass, so you cannot change or remove the parameter then.

Example:

final class Foo: NSView {
	override func acceptsFirstMouse(for event: NSEvent?) -> Bool { true }
}

Same applies to protocol conformances, but I don't think it's possible to catch such cases unless the rule becomes an analyzer rule.

Environment

• SwiftLint version: 0.56.0
• Xcode version: Xcode 15.4, Build version 15F31d
• Installation method used: Installer
• Configuration file:

only_rules:
  - unused_parameter

[SimplyDanny]

What the rule suggests in this case is

final class Foo: NSView {
	override func acceptsFirstMouse(for _: NSEvent?) -> Bool { true }
}

which is even valid for override functions.

[sindresorhus]

That's not optimal, but I guess this can be closed in favor of:

final class Foo: NSView {
	override func acceptsFirstMouse(for _event: NSEvent?) -> Bool { true }
}

#5741 (comment)