sp-std removal from substrate/primitives (#3274)

This PR removes sp-std crate from substrate/primitives sub-directories.

For now crates that have `pub use` of sp-std or export macros that would
necessitate users of the macros to `extern crate alloc` have been
excluded from this PR.

There should be no breaking changes in this PR.

---------

Co-authored-by: Koute <koute@users.noreply.github.com>

substrate/primitives/crypto/ec-utils/src/bls12_377.rs

@@ -18,10 +18,10 @@
 //! *BLS12-377* types and host functions.
 
 use crate::utils;
+use alloc::vec::Vec;
 use ark_bls12_377_ext::CurveHooks;
 use ark_ec::{pairing::Pairing, CurveConfig};
 use sp_runtime_interface::runtime_interface;
-use sp_std::vec::Vec;
 
 /// First pairing group definitions.
 pub mod g1 {

substrate/primitives/crypto/ec-utils/src/bls12_381.rs

@@ -18,10 +18,10 @@
 //! *BLS12-381* types and host functions.
 
 use crate::utils;
+use alloc::vec::Vec;
 use ark_bls12_381_ext::CurveHooks;
 use ark_ec::{pairing::Pairing, CurveConfig};
 use sp_runtime_interface::runtime_interface;
-use sp_std::vec::Vec;
 
 /// First pairing group definitions.
 pub mod g1 {

substrate/primitives/crypto/ec-utils/src/bw6_761.rs

@@ -18,10 +18,10 @@
 //! *BW6-761* types and host functions.
 
 use crate::utils;
+use alloc::vec::Vec;
 use ark_bw6_761_ext::CurveHooks;
 use ark_ec::{pairing::Pairing, CurveConfig};
 use sp_runtime_interface::runtime_interface;
-use sp_std::vec::Vec;
 
 /// First pairing group definitions.
 pub mod g1 {

substrate/primitives/crypto/ec-utils/src/ed_on_bls12_377.rs

@@ -18,10 +18,10 @@
 //! *Ed-on-BLS12-377* types and host functions.
 
 use crate::utils;
+use alloc::vec::Vec;
 use ark_ec::CurveConfig;
 use ark_ed_on_bls12_377_ext::CurveHooks;
 use sp_runtime_interface::runtime_interface;
-use sp_std::vec::Vec;
 
 /// Curve hooks jumping into [`host_calls`] host functions.
 #[derive(Copy, Clone)]

substrate/primitives/crypto/ec-utils/src/ed_on_bls12_381_bandersnatch.rs

@@ -19,10 +19,10 @@
 //! computationally expensive operations.
 
 use crate::utils;
+use alloc::vec::Vec;
 use ark_ec::CurveConfig;
 use ark_ed_on_bls12_381_bandersnatch_ext::CurveHooks;
 use sp_runtime_interface::runtime_interface;
-use sp_std::vec::Vec;
 
 /// Curve hooks jumping into [`host_calls`] host functions.
 #[derive(Copy, Clone)]

substrate/primitives/crypto/ec-utils/src/lib.rs

@@ -32,6 +32,8 @@
 #![warn(missing_docs)]
 #![cfg_attr(not(feature = "std"), no_std)]
 
+extern crate alloc;
+
 #[cfg(feature = "bls12-377")]
 pub mod bls12_377;
 #[cfg(feature = "bls12-381")]

substrate/primitives/crypto/ec-utils/src/utils.rs

@@ -21,6 +21,7 @@
 // curve may be excluded by the build we resort to `#[allow(unused)]` to
 // suppress the expected warning.
 
+use alloc::vec::Vec;
 use ark_ec::{
 	pairing::{MillerLoopOutput, Pairing},
 	short_weierstrass::{Affine as SWAffine, Projective as SWProjective, SWCurveConfig},
@@ -31,7 +32,6 @@ use ark_scale::{
 	ark_serialize::{CanonicalDeserialize, CanonicalSerialize, Compress, Validate},
 	scale::{Decode, Encode},
 };
-use sp_std::vec::Vec;
 
 // SCALE encoding parameters shared by all the enabled modules
 const SCALE_USAGE: u8 = ark_scale::make_usage(Compress::No, Validate::No);