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/consensus/beefy/src/commitment.rs

@@ -15,9 +15,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use alloc::{vec, vec::Vec};
 use codec::{Decode, Encode, Error, Input};
+use core::cmp;
 use scale_info::TypeInfo;
-use sp_std::{cmp, prelude::*};
 
 use crate::{Payload, ValidatorSetId};
 
@@ -97,10 +98,10 @@ pub struct SignedCommitment<TBlockNumber, TSignature> {
 	pub signatures: Vec<Option<TSignature>>,
 }
 
-impl<TBlockNumber: sp_std::fmt::Debug, TSignature> sp_std::fmt::Display
+impl<TBlockNumber: core::fmt::Debug, TSignature> core::fmt::Display
 	for SignedCommitment<TBlockNumber, TSignature>
 {
-	fn fmt(&self, f: &mut sp_std::fmt::Formatter<'_>) -> sp_std::fmt::Result {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		let signatures_count = self.signatures.iter().filter(|s| s.is_some()).count();
 		write!(
 			f,
@@ -254,8 +255,8 @@ pub enum VersionedFinalityProof<N, S> {
 	V1(SignedCommitment<N, S>),
 }
 
-impl<N: sp_std::fmt::Debug, S> sp_std::fmt::Display for VersionedFinalityProof<N, S> {
-	fn fmt(&self, f: &mut sp_std::fmt::Formatter<'_>) -> sp_std::fmt::Result {
+impl<N: core::fmt::Debug, S> core::fmt::Display for VersionedFinalityProof<N, S> {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		match self {
 			VersionedFinalityProof::V1(sc) => write!(f, "VersionedFinalityProof::V1({})", sc),
 		}

substrate/primitives/consensus/beefy/src/lib.rs

@@ -31,6 +31,8 @@
 //! it will use a different set of keys. For Polkadot use case we plan to use `secp256k1` for BEEFY,
 //! while GRANDPA uses `ed25519`.
 
+extern crate alloc;
+
 mod commitment;
 mod payload;
 
@@ -44,13 +46,13 @@ pub mod test_utils;
 pub use commitment::{Commitment, SignedCommitment, VersionedFinalityProof};
 pub use payload::{known_payloads, BeefyPayloadId, Payload, PayloadProvider};
 
+use alloc::vec::Vec;
 use codec::{Codec, Decode, Encode};
 use core::fmt::{Debug, Display};
 use scale_info::TypeInfo;
 use sp_application_crypto::{AppCrypto, AppPublic, ByteArray, RuntimeAppPublic};
 use sp_core::H256;
 use sp_runtime::traits::{Hash, Keccak256, NumberFor};
-use sp_std::prelude::*;
 
 /// Key type for BEEFY module.
 pub const KEY_TYPE: sp_core::crypto::KeyTypeId = sp_application_crypto::key_types::BEEFY;

substrate/primitives/consensus/beefy/src/mmr.rs

@@ -26,7 +26,8 @@
 //! but we imagine they will be useful for other chains that either want to bridge with Polkadot
 //! or are completely standalone, but heavily inspired by Polkadot.
 
-use crate::{ecdsa_crypto::AuthorityId, ConsensusLog, MmrRootHash, Vec, BEEFY_ENGINE_ID};
+use crate::{ecdsa_crypto::AuthorityId, ConsensusLog, MmrRootHash, BEEFY_ENGINE_ID};
+use alloc::vec::Vec;
 use codec::{Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
 use sp_runtime::{
@@ -150,10 +151,11 @@ pub use mmr_root_provider::MmrRootProvider;
 mod mmr_root_provider {
 	use super::*;
 	use crate::{known_payloads, payload::PayloadProvider, Payload};
+	use alloc::sync::Arc;
+	use core::marker::PhantomData;
 	use sp_api::ProvideRuntimeApi;
 	use sp_mmr_primitives::MmrApi;
 	use sp_runtime::traits::NumberFor;
-	use sp_std::{marker::PhantomData, sync::Arc};
 
 	/// A [`crate::Payload`] provider where payload is Merkle Mountain Range root hash.
 	///

substrate/primitives/consensus/beefy/src/payload.rs

@@ -15,10 +15,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use alloc::{vec, vec::Vec};
 use codec::{Decode, Encode};
 use scale_info::TypeInfo;
 use sp_runtime::traits::Block;
-use sp_std::prelude::*;
 
 /// Id of different payloads in the [`crate::Commitment`] data.
 pub type BeefyPayloadId = [u8; 2];

substrate/primitives/consensus/beefy/src/witness.rs

@@ -23,9 +23,8 @@
 //! verification. This allows lowering the data and computation cost of verifying the
 //! signed commitment.
 
-use sp_std::prelude::*;
-
 use crate::commitment::{Commitment, SignedCommitment};
+use alloc::vec::Vec;
 
 /// A light form of [SignedCommitment].
 ///