Remove incorrect sanity check (#9924)

* causes issue

* remove the bad error check

substrate/bin/node/runtime/src/lib.rs

@@ -1728,7 +1728,6 @@ impl_runtime_apis! {
 			add_benchmark!(params, batches, pallet_utility, Utility);
 			add_benchmark!(params, batches, pallet_vesting, Vesting);
 
-			if batches.is_empty() { return Err("Benchmark not found for this pallet.".into()) }
 			Ok(batches)
 		}
 	}