sc-cli: Remove SubstrateCli::native_runtime_version function (#14511)

The native runtime will be removed in the near future and thus this function will not be required
anymore.

\# Code changes

Downstream users just need to remove `native_runtime_version` from their implementation of the
`SubstrateCli` trait.

substrate/client/cli/src/commands/insert_key.rs

@@ -125,10 +125,6 @@ mod tests {
 			"test".into()
 		}
 
-		fn native_runtime_version(_: &Box<dyn ChainSpec>) -> &'static sp_version::RuntimeVersion {
-			unimplemented!("Not required in tests")
-		}
-
 		fn load_spec(&self, _: &str) -> std::result::Result<Box<dyn ChainSpec>, String> {
 			Ok(Box::new(GenericChainSpec::from_genesis(
 				"test",

substrate/client/cli/src/lib.rs

@@ -248,6 +248,4 @@ pub trait SubstrateCli: Sized {
 		command.init(&Self::support_url(), &Self::impl_version(), logger_hook, &config)?;
 		Runner::new(config, tokio_runtime, signals)
 	}
-	/// Native runtime version.
-	fn native_runtime_version(chain_spec: &Box<dyn ChainSpec>) -> &'static RuntimeVersion;
 }

substrate/client/cli/src/runner.rs

@@ -187,23 +187,18 @@ pub fn print_node_infos<C: SubstrateCli>(config: &Configuration) {
 			.path()
 			.map_or_else(|| "<unknown>".to_owned(), |p| p.display().to_string())
 	);
-	info!("⛓  Native runtime: {}", C::native_runtime_version(&config.chain_spec));
 }
 
 #[cfg(test)]
 mod tests {
+	use super::*;
+	use sc_network::config::NetworkConfiguration;
+	use sc_service::{Arc, ChainType, GenericChainSpec, NoExtension};
 	use std::{
 		path::PathBuf,
 		sync::atomic::{AtomicU64, Ordering},
 	};
 
-	use sc_network::config::NetworkConfiguration;
-	use sc_service::{Arc, ChainType, GenericChainSpec, NoExtension};
-	use sp_runtime::create_runtime_str;
-	use sp_version::create_apis_vec;
-
-	use super::*;
-
 	struct Cli;
 
 	impl SubstrateCli for Cli {
@@ -237,23 +232,6 @@ mod tests {
 		) -> std::result::Result<Box<dyn sc_service::ChainSpec>, String> {
 			Err("nope".into())
 		}
-
-		fn native_runtime_version(
-			_: &Box<dyn sc_service::ChainSpec>,
-		) -> &'static sp_version::RuntimeVersion {
-			const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
-				spec_name: create_runtime_str!("spec"),
-				impl_name: create_runtime_str!("name"),
-				authoring_version: 0,
-				spec_version: 0,
-				impl_version: 0,
-				apis: create_apis_vec!([]),
-				transaction_version: 2,
-				state_version: 0,
-			};
-
-			&VERSION
-		}
 	}
 
 	fn create_runner() -> Runner<Cli> {