Remove manual implementation (#14096)

substrate/primitives/runtime/src/curve.rs

@@ -22,9 +22,10 @@ use crate::{
 	Perbill,
 };
 use core::ops::Sub;
+use scale_info::TypeInfo;
 
 /// Piecewise Linear function in [0, 1] -> [0, 1].
-#[derive(PartialEq, Eq, sp_core::RuntimeDebug)]
+#[derive(PartialEq, Eq, sp_core::RuntimeDebug, TypeInfo)]
 pub struct PiecewiseLinear<'a> {
 	/// Array of points. Must be in order from the lowest abscissas to the highest.
 	pub points: &'a [(Perbill, Perbill)],
@@ -32,36 +33,6 @@ pub struct PiecewiseLinear<'a> {
 	pub maximum: Perbill,
 }
 
-// This can be replaced with
-// #[derive(scale_info::TypeInfo)]
-// #[scale_info(skip_type_params(S))]
-// again once this issue is fixed in the rust compiler: https://github.com/rust-lang/rust/issues/96956
-// Tracking issues: https://github.com/paritytech/substrate/issues/11915
-impl scale_info::TypeInfo for PiecewiseLinear<'static> {
-	type Identity = Self;
-	fn type_info() -> ::scale_info::Type {
-		scale_info::Type::builder()
-			.path(scale_info::Path::new("PiecewiseLinear", "sp_runtime::curve"))
-			.type_params(crate::Vec::new())
-			.docs(&["Piecewise Linear function in [0, 1] -> [0, 1]."])
-			.composite(
-				scale_info::build::Fields::named()
-					.field(|f| {
-						f.ty::<&'static[(Perbill, Perbill)]>()
-							  .name("points")
-							  .type_name("&'static[(Perbill, Perbill)]")
-							  .docs(&["Array of points. Must be in order from the lowest abscissas to the highest."])
-					})
-					.field(|f| {
-						f.ty::<Perbill>()
-							.name("maximum")
-							.type_name("Perbill")
-							.docs(&["The maximum value that can be returned."])
-					}),
-			)
-	}
-}
-
 fn abs_sub<N: Ord + Sub<Output = N> + Clone>(a: N, b: N) -> N where {
 	a.clone().max(b.clone()) - a.min(b)
 }