multi calls for democracy.votes and staking.controllers (#887)

* .multi for democracy.votes & stating.controllers

* Removed leftover comment from https://github.com/polkadot-js/api/pull/875

* no new line at the end

packages/api-derive/src/balances/fees.ts

@@ -12,7 +12,6 @@ import { drr } from '../util/drr';
 
 export function fees (api: ApiInterface$Rx) {
   return (): Observable<DerivedFees> => {
-    // FIXME Remove fees checks, only use balances (fees is a removed module now)
     return (combineLatest([
       api.query.balances.creationFee(),
       api.query.balances.existentialDeposit(),