Update primitives/runtime/src/traits.rs

Co-authored-by: Keith Yeung <[email protected]>

Author: PraetorP

primitives/runtime/src/traits.rs

@@ -541,7 +541,7 @@ morph_types! {
 	pub type Replace<V: TypedGet> = |_| -> V::Type { V::get() };
 
 	/// Morpher to disregard the source value.
-	pub type Ignore = |_| -> () { () };
+	pub type Ignore = |_| {};
 
 	/// Mutator which reduces a scalar by a particular amount.
 	pub type ReduceBy<N: TypedGet> = |r: N::Type| -> N::Type {