Remove deprecated TryRuntime subcommand (#4017)

Completes the removal of `try-runtime-cli` logic from `polkadot-sdk`.

polkadot/cli/src/cli.rs

@@ -50,11 +50,6 @@ pub enum Subcommand {
 	#[command(subcommand)]
 	Benchmark(frame_benchmarking_cli::BenchmarkCmd),
 
-	/// Try-runtime has migrated to a standalone CLI
-	/// (<https://github.com/paritytech/try-runtime-cli>). The subcommand exists as a stub and
-	/// deprecation notice. It will be removed entirely some time after January 2024.
-	TryRuntime,
-
 	/// Key management CLI utilities
 	#[command(subcommand)]
 	Key(sc_cli::KeySubcommand),

polkadot/cli/src/command.rs

@@ -476,13 +476,6 @@ pub fn run() -> Result<()> {
 			}
 		},
 		Some(Subcommand::Key(cmd)) => Ok(cmd.run(&cli)?),
-		#[cfg(feature = "try-runtime")]
-		Some(Subcommand::TryRuntime) => Err(try_runtime_cli::DEPRECATION_NOTICE.to_owned().into()),
-		#[cfg(not(feature = "try-runtime"))]
-		Some(Subcommand::TryRuntime) => Err("TryRuntime wasn't enabled when building the node. \
-				You can enable it with `--features try-runtime`."
-			.to_owned()
-			.into()),
 		Some(Subcommand::ChainInfo(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
 			Ok(runner.sync_run(|config| cmd.run::<service::Block>(&config))?)