Attempt to remove the where bounds in arithmetic. (#7933)

* Attempt to remove the where bounds.

* Fix further and further.

* Format better.

* Update primitives/npos-elections/src/lib.rs

* fix build

* remove unused

substrate/primitives/election-providers/src/onchain.rs

@@ -17,7 +17,6 @@
 
 //! An implementation of [`ElectionProvider`] that does an on-chain sequential phragmen.
 
-use sp_arithmetic::InnerOf;
 use crate::{ElectionDataProvider, ElectionProvider};
 use sp_npos_elections::*;
 use sp_std::{collections::btree_map::BTreeMap, marker::PhantomData, prelude::*};
@@ -58,10 +57,7 @@ pub trait Config {
 	type DataProvider: ElectionDataProvider<Self::AccountId, Self::BlockNumber>;
 }
 
-impl<T: Config> ElectionProvider<T::AccountId, T::BlockNumber> for OnChainSequentialPhragmen<T>
-where
-	ExtendedBalance: From<InnerOf<T::Accuracy>>,
-{
+impl<T: Config> ElectionProvider<T::AccountId, T::BlockNumber> for OnChainSequentialPhragmen<T> {
 	type Error = Error;
 	type DataProvider = T::DataProvider;