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/test-utils/runtime/src/extrinsic.rs

@@ -26,7 +26,6 @@ use frame_system::{CheckNonce, CheckWeight};
 use sp_core::crypto::Pair as TraitPair;
 use sp_keyring::AccountKeyring;
 use sp_runtime::{transaction_validity::TransactionPriority, Perbill};
-use sp_std::prelude::*;
 
 /// Transfer used in test substrate pallet. Extrinsic is created and signed using this data.
 #[derive(Clone)]

substrate/test-utils/runtime/src/lib.rs

@@ -19,6 +19,8 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+extern crate alloc;
+
 #[cfg(feature = "std")]
 pub mod extrinsic;
 #[cfg(feature = "std")]
@@ -42,9 +44,10 @@ use frame_system::{
 	CheckNonce, CheckWeight,
 };
 use scale_info::TypeInfo;
-use sp_std::prelude::*;
+
+use alloc::boxed::Box;
 #[cfg(not(feature = "std"))]
-use sp_std::vec;
+use alloc::{vec, vec::Vec};
 
 use sp_application_crypto::{ecdsa, ed25519, sr25519, RuntimeAppPublic};
 use sp_core::{OpaqueMetadata, RuntimeDebug};
@@ -265,7 +268,7 @@ impl sp_runtime::traits::SignedExtension for CheckSubstrateCall {
 
 	fn additional_signed(
 		&self,
-	) -> sp_std::result::Result<Self::AdditionalSigned, TransactionValidityError> {
+	) -> core::result::Result<Self::AdditionalSigned, TransactionValidityError> {
 		Ok(())
 	}
 
@@ -440,7 +443,7 @@ fn code_using_trie() -> u64 {
 	.to_vec();
 
 	let mut mdb = PrefixedMemoryDB::default();
-	let mut root = sp_std::default::Default::default();
+	let mut root = core::default::Default::default();
 	{
 		let mut t = TrieDBMutBuilderV1::<Hashing>::new(&mut mdb, &mut root).build();
 		for (key, value) in &pairs {
@@ -494,7 +497,7 @@ impl_runtime_apis! {
 		fn metadata_at_version(_version: u32) -> Option<OpaqueMetadata> {
 			unimplemented!()
 		}
-		fn metadata_versions() -> sp_std::vec::Vec<u32> {
+		fn metadata_versions() -> alloc::vec::Vec<u32> {
 			unimplemented!()
 		}
 	}

substrate/test-utils/runtime/src/substrate_test_pallet.rs

@@ -21,6 +21,7 @@
 //! functioning runtime. Some calls are allowed to be submitted as unsigned extrinsics, however most
 //! of them requires signing. Refer to `pallet::Call` for further details.
 
+use alloc::{vec, vec::Vec};
 use frame_support::{pallet_prelude::*, storage};
 use sp_core::sr25519::Public;
 use sp_runtime::{
@@ -29,7 +30,6 @@ use sp_runtime::{
 		InvalidTransaction, TransactionSource, TransactionValidity, ValidTransaction,
 	},
 };
-use sp_std::prelude::*;
 
 pub use self::pallet::*;
 
@@ -59,7 +59,7 @@ pub mod pallet {
 	pub struct GenesisConfig<T: Config> {
 		pub authorities: Vec<Public>,
 		#[serde(skip)]
-		pub _config: sp_std::marker::PhantomData<T>,
+		pub _config: core::marker::PhantomData<T>,
 	}
 
 	#[pallet::genesis_build]