PVF: Fix external workers being required for non-collator full nodes (#7566)

* PVF: Fix external workers being required for non-collator full nodes

* Fix

* Make check more precise

> This might as well be if role.is_authority() as there aren't really any nodes
> that are both authorities and collators. But if there were a node that is an
> authority and a collator, it'd probably want to validate candidates (in its
> role as an authority).

* Just seeing if this fixes zombienet CI...

polkadot/cli/src/cli.rs

@@ -71,17 +71,6 @@ pub enum Subcommand {
 	ChainInfo(sc_cli::ChainInfoCmd),
 }
 
-#[allow(missing_docs)]
-#[derive(Debug, Parser)]
-pub struct ValidationWorkerCommand {
-	/// The path to the validation host's socket.
-	#[arg(long)]
-	pub socket_path: String,
-	/// Calling node implementation version
-	#[arg(long)]
-	pub node_impl_version: String,
-}
-
 #[allow(missing_docs)]
 #[derive(Debug, Parser)]
 #[group(skip)]