Migrate pallet-babe to pallet attribute macro. (paritytech#8310)

* Migrate pallet-babe to pallet attribute macro.

* Remove unnecessary bound in pallet storage.

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

frame/babe/src/benchmarking.rs

@@ -91,7 +91,7 @@ mod tests {
 			let equivocation_proof = generate_equivocation_proof(
 				offending_authority_index,
 				offending_authority_pair,
-				CurrentSlot::get() + 1,
+				CurrentSlot::<Test>::get() + 1,
 			);
 
 			println!("equivocation_proof: {:?}", equivocation_proof);

frame/babe/src/equivocation.rs

@@ -48,7 +48,7 @@ use sp_staking::{
 };
 use sp_std::prelude::*;
 
-use crate::{Call, Module, Config};
+use crate::{Call, Pallet, Config};
 
 /// A trait with utility methods for handling equivocation reports in BABE.
 /// The trait provides methods for reporting an offence triggered by a valid
@@ -182,7 +182,7 @@ where
 /// A `ValidateUnsigned` implementation that restricts calls to `report_equivocation_unsigned`
 /// to local calls (i.e. extrinsics generated on this node) or that already in a block. This
 /// guarantees that only block authors can include unsigned equivocation reports.
-impl<T: Config> frame_support::unsigned::ValidateUnsigned for Module<T> {
+impl<T: Config> frame_support::unsigned::ValidateUnsigned for Pallet<T> {
 	type Call = Call<T>;
 	fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
 		if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {