remove some unecessary bound (#7813)

Author: gui1117

frame/transaction-payment/rpc/src/lib.rs

@@ -73,7 +73,7 @@ impl<C, Block, Balance> TransactionPaymentApi<<Block as BlockT>::Hash, RuntimeDi
 	for TransactionPayment<C, Block>
 where
 	Block: BlockT,
-	C: Send + Sync + 'static + ProvideRuntimeApi<Block> + HeaderBackend<Block>,
+	C: 'static + ProvideRuntimeApi<Block> + HeaderBackend<Block>,
 	C::Api: TransactionPaymentRuntimeApi<Block, Balance>,
 	Balance: Codec + MaybeDisplay + MaybeFromStr,
 {

frame/transaction-payment/src/lib.rs

@@ -314,8 +314,6 @@ impl<T: Config> Module<T> where
 		len: u32,
 	) -> RuntimeDispatchInfo<BalanceOf<T>>
 	where
-		T: Send + Sync,
-		BalanceOf<T>: Send + Sync,
 		T::Call: Dispatchable<Info=DispatchInfo>,
 	{
 		// NOTE: we can actually make it understand `ChargeTransactionPayment`, but would be some
@@ -444,9 +442,9 @@ impl<T> Convert<Weight, BalanceOf<T>> for Module<T> where
 /// Require the transactor pay for themselves and maybe include a tip to gain additional priority
 /// in the queue.
 #[derive(Encode, Decode, Clone, Eq, PartialEq)]
-pub struct ChargeTransactionPayment<T: Config + Send + Sync>(#[codec(compact)] BalanceOf<T>);
+pub struct ChargeTransactionPayment<T: Config>(#[codec(compact)] BalanceOf<T>);
 
-impl<T: Config + Send + Sync> ChargeTransactionPayment<T> where
+impl<T: Config> ChargeTransactionPayment<T> where
 	T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo>,
 	BalanceOf<T>: Send + Sync + FixedPointOperand,
 {
@@ -494,7 +492,7 @@ impl<T: Config + Send + Sync> ChargeTransactionPayment<T> where
 	}
 }
 
-impl<T: Config + Send + Sync> sp_std::fmt::Debug for ChargeTransactionPayment<T> {
+impl<T: Config> sp_std::fmt::Debug for ChargeTransactionPayment<T> {
 	#[cfg(feature = "std")]
 	fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
 		write!(f, "ChargeTransactionPayment<{:?}>", self.0)
@@ -505,7 +503,7 @@ impl<T: Config + Send + Sync> sp_std::fmt::Debug for ChargeTransactionPayment<T>
 	}
 }
 
-impl<T: Config + Send + Sync> SignedExtension for ChargeTransactionPayment<T> where
+impl<T: Config> SignedExtension for ChargeTransactionPayment<T> where
 	BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,
 	T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo>,
 {