Clean up sr-io (#3609)

* Move trait `Printable` into `sr-primitives`

* Cleanup runtime io trie_root interfaces

* Remove last generic bits from sr-io interface

* Fix srml-sudo after master merge

* Fix benchmarks

* Runtime bump

substrate/core/client/src/block_builder/block_builder.rs

@@ -128,7 +128,7 @@ where
 		debug_assert_eq!(
 			self.header.extrinsics_root().clone(),
 			HashFor::<Block>::ordered_trie_root(
-				self.extrinsics.iter().map(Encode::encode)
+				self.extrinsics.iter().map(Encode::encode).collect(),
 			),
 		);