Remove unneeded Serde requirements (#1076)

* Remove superfluous serde requirements.

* Try to ensure hash is serde

* Fixups

* Building again

* Attempt to reenable Block (doesn't build)

* Fixes compilation for node cli

* Fixes test compilation

* Fix wasm

* Fix tests

* Remove unneeded changes

* Fix up comments

* Reenable some code

* Compile error when origin misused.

* Remove unnecessary includes of `serde_derive`

* Cleanups

substrate/srml/balances/src/address.rs

@@ -22,16 +22,14 @@ use super::{Member, Decode, Encode, As, Input, Output};
 
 /// A vetted and verified extrinsic from the external world.
 #[derive(PartialEq, Eq, Clone)]
-#[cfg_attr(feature = "std", derive(Serialize, Deserialize, Debug, Hash))]
+#[cfg_attr(feature = "std", derive(Debug, Hash))]
 pub enum Address<AccountId, AccountIndex> where
 	AccountId: Member,
 	AccountIndex: Member,
 {
 	/// It's an account ID (pubkey).
-	#[cfg_attr(feature = "std", serde(deserialize_with="AccountId::deserialize"))]
 	Id(AccountId),
 	/// It's an account index.
-	#[cfg_attr(feature = "std", serde(deserialize_with="AccountIndex::deserialize"))]
 	Index(AccountIndex),
 }
 

substrate/srml/balances/src/lib.rs

@@ -18,10 +18,6 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
-#[cfg(feature = "std")]
-#[macro_use]
-extern crate serde_derive;
-
 #[macro_use]
 extern crate srml_support as runtime_support;
 

substrate/srml/balances/src/mock.rs

@@ -72,6 +72,7 @@ impl ExtBuilder {
 		self.existential_deposit = existential_deposit;
 		self
 	}
+	#[allow(dead_code)]
 	pub fn transfer_fee(mut self, transfer_fee: u64) -> Self {
 		self.transfer_fee = transfer_fee;
 		self