Revert "Bump parity-scale-codec and derive DecodeWithMemTracking"

This reverts commit 3009a37.

Author: clangenb

Cargo.toml

@@ -34,10 +34,10 @@ typenum = { package = "substrate-typenum", version = "1.16.0", features = [
 az = { version = "0.3", optional = true }
 half = { version = "1.4", optional = true }
 serde = { version = "1.0.60", default-features = false, optional = true }
-scale-info = { version = "2.11.6", default-features = false, features = [
+scale-info = { version = "2.5.0", default-features = false, features = [
   "derive",
 ] }
-codec = { package = "parity-scale-codec", version = "3.7.4", default-features = false, features = [
+codec = { package = "parity-scale-codec", version = "3.6.1", default-features = false, features = [
   "derive",
   "max-encoded-len",
 ] }

src/lib.rs

@@ -311,7 +311,7 @@ mod macros_no_frac;
 #[macro_use]
 mod macros_frac;
 
-use codec::{Decode, Encode, DecodeWithMemTracking, MaxEncodedLen};
+use codec::{Decode, Encode, MaxEncodedLen};
 macro_rules! fixed {
     (
         $description:expr,
@@ -361,7 +361,7 @@ assert_eq!(two_point_75.to_string(), \"2.8\");
 [typenum crate]: https://crates.io/crates/typenum
 ";
             #[repr(transparent)]
-            #[derive(Encode, Decode, DecodeWithMemTracking, scale_info::TypeInfo, MaxEncodedLen)]
+            #[derive(Encode, Decode, scale_info::TypeInfo, MaxEncodedLen)]
             pub struct $Fixed<Frac> {
                 bits: $Inner,
                 phantom: PhantomData<Frac>,