Fix unused doc warning in Rust 1.35 (#2863)

This version brings a new warning to inform that rustdoc doesn't add docs for macro
expansions

core/src/core/id.rs

@@ -74,9 +74,9 @@ impl<H: Hashed> ShortIdentifiable for H {
 pub struct ShortId([u8; 6]);
 
 impl DefaultHashable for ShortId {}
-/// We want to sort short_ids in a canonical and consistent manner so we can
-/// verify sort order in the same way we do for full inputs|outputs|kernels
-/// themselves.
+// We want to sort short_ids in a canonical and consistent manner so we can
+// verify sort order in the same way we do for full inputs|outputs|kernels
+// themselves.
 hashable_ord!(ShortId);
 
 impl ::std::fmt::Debug for ShortId {

core/src/core/transaction.rs

@@ -35,7 +35,7 @@ use std::cmp::{max, min};
 use std::sync::Arc;
 use std::{error, fmt};
 
-/// Enum of various supported kernel "features".
+// Enum of various supported kernel "features".
 enum_from_primitive! {
 	/// Various flavors of tx kernel.
 	#[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
@@ -1214,7 +1214,7 @@ impl Input {
 	}
 }
 
-/// Enum of various supported kernel "features".
+// Enum of various supported kernel "features".
 enum_from_primitive! {
 	/// Various flavors of tx kernel.
 	#[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]