Sub/unsub cleanups (#1535)

* Sub/unsub cleanups

* drr full idAndIndex

* Memo on nick call

* refCountDelay

* Remove scheduler param, always asap

* Flatten

* Test cleanups

* Make tests pass

* Remove logs

* Drop nick memo

* sourceConnection.unsubscribe

* Small cleanups

packages/api-derive/src/staking/all.ts

@@ -8,7 +8,7 @@ import { Observable, combineLatest } from 'rxjs';
 import { switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 
-import { drr } from '../util/drr';
+import { drr } from '../util';
 import { controllers } from './controllers';
 import { info } from './info';
 

packages/api-derive/src/staking/controllers.ts

@@ -10,7 +10,7 @@ import { switchMap } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { Option } from '@polkadot/types';
 
-import { drr } from '../util/drr';
+import { drr } from '../util';
 
 /**
  * @description From the list of stash accounts, retrieve the list of controllers

packages/api-derive/src/staking/info.ts

@@ -20,7 +20,7 @@ import { isUndefined } from '@polkadot/util';
 import { bestNumber } from '../chain/bestNumber';
 import { eraLength } from '../session/eraLength';
 import { recentlyOffline } from './recentlyOffline';
-import { drr } from '../util/drr';
+import { drr } from '../util';
 
 interface Calls {
   bestNumberCall (): Observable<BlockNumber>;

packages/api-derive/src/staking/recentlyOffline.ts

@@ -11,7 +11,7 @@ import { map } from 'rxjs/operators';
 import { ApiInterfaceRx } from '@polkadot/api/types';
 import { DerivedRecentlyOffline } from '../types';
 
-import { drr } from '../util/drr';
+import { drr } from '../util';
 
 type OfflineResult = [AccountId, BlockNumber, BN][] & Codec;