[big refactor] Remove crate aliasing. (#4395)

* Rename: Phase 1.

* Unify codec.

* Fixing: Phase 2

* Fixing: Phase 3.

* Fixing: Phase 4.

* Fixing: Phase 5.

* Fixing: Phase 6.

* Fixing: Phase 7.

* Fixing: Phase 8. Tests

* Fixing: Phase 9. Tests!!!

* Fixing: Phase 10. Moar tests!

* Finally done!

* More fixes.

* Rename primitives:: to sp_core::

* Apply renames in finality-grandpa.

* Fix benches.

* Fix benches 2.

* Revert node-template.

* Fix frame-system in our modules.

substrate/primitives/runtime/src/generic/block.rs

@@ -23,7 +23,7 @@ use std::fmt;
 use serde::{Deserialize, Serialize};
 
 use sp_std::prelude::*;
-use primitives::RuntimeDebug;
+use sp_core::RuntimeDebug;
 use crate::codec::{Codec, Encode, Decode};
 use crate::traits::{self, Member, Block as BlockT, Header as HeaderT, MaybeSerialize};
 use crate::Justification;

substrate/primitives/runtime/src/generic/checked_extrinsic.rs

@@ -27,7 +27,7 @@ use crate::transaction_validity::TransactionValidity;
 /// Definition of something that the external world might want to say; its
 /// existence implies that it has been checked and is good, particularly with
 /// regards to the signature.
-#[derive(PartialEq, Eq, Clone, primitives::RuntimeDebug)]
+#[derive(PartialEq, Eq, Clone, sp_core::RuntimeDebug)]
 pub struct CheckedExtrinsic<AccountId, Call, Extra> {
 	/// Who this purports to be from and the number of extrinsics have come before
 	/// from the same signer, if anyone (note this is not a signature).

substrate/primitives/runtime/src/generic/digest.rs

@@ -23,7 +23,7 @@ use sp_std::prelude::*;
 
 use crate::ConsensusEngineId;
 use crate::codec::{Decode, Encode, Input, Error};
-use primitives::RuntimeDebug;
+use sp_core::RuntimeDebug;
 
 /// Generic header digest.
 #[derive(PartialEq, Eq, Clone, Encode, Decode, RuntimeDebug)]
@@ -105,7 +105,7 @@ pub enum DigestItem<Hash> {
 impl<Hash: Encode> serde::Serialize for DigestItem<Hash> {
 	fn serialize<S>(&self, seq: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
 		self.using_encoded(|bytes| {
-			primitives::bytes::serialize(bytes, seq)
+			sp_core::bytes::serialize(bytes, seq)
 		})
 	}
 }
@@ -115,7 +115,7 @@ impl<'a, Hash: Decode> serde::Deserialize<'a> for DigestItem<Hash> {
 	fn deserialize<D>(de: D) -> Result<Self, D::Error> where
 		D: serde::Deserializer<'a>,
 	{
-		let r = primitives::bytes::deserialize(de)?;
+		let r = sp_core::bytes::deserialize(de)?;
 		Decode::decode(&mut &r[..])
 			.map_err(|e| serde::de::Error::custom(format!("Decode error: {}", e)))
 	}

substrate/primitives/runtime/src/generic/era.rs

@@ -28,7 +28,7 @@ pub type Period = u64;
 pub type Phase = u64;
 
 /// An era to describe the longevity of a transaction.
-#[derive(PartialEq, Eq, Clone, Copy, primitives::RuntimeDebug)]
+#[derive(PartialEq, Eq, Clone, Copy, sp_core::RuntimeDebug)]
 #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
 pub enum Era {
 	/// The transaction is valid forever. The genesis hash must be present in the signed content.

substrate/primitives/runtime/src/generic/header.rs

@@ -24,14 +24,14 @@ use crate::traits::{
 	MaybeSerializeDeserialize, MaybeSerialize, MaybeDisplay,
 };
 use crate::generic::Digest;
-use primitives::U256;
+use sp_core::U256;
 use sp_std::{
 	convert::TryFrom,
 	fmt::Debug,
 };
 
 /// Abstraction over a block header for a substrate chain.
-#[derive(PartialEq, Eq, Clone, primitives::RuntimeDebug)]
+#[derive(PartialEq, Eq, Clone, sp_core::RuntimeDebug)]
 #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "std", serde(rename_all = "camelCase"))]
 #[cfg_attr(feature = "std", serde(deny_unknown_fields))]

substrate/primitives/runtime/src/generic/tests.rs

@@ -17,7 +17,7 @@
 //! Tests for the generic implementations of Extrinsic/Header/Block.
 
 use crate::codec::{Decode, Encode};
-use primitives::H256;
+use sp_core::H256;
 use super::DigestItem;
 
 #[test]