Remove unexported staking.infostash derive (duplicated as .query) (#1877)

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

@@ -1,46 +0,0 @@
-// Copyright 2017-2020 @polkadot/api-derive authors & contributors
-// This software may be modified and distributed under the terms
-// of the Apache-2.0 license. See the LICENSE file for details.
-
-import { ApiInterfaceRx } from '@polkadot/api/types';
-import { AccountId, Exposure, Keys, Nominations, RewardDestination, ValidatorPrefs } from '@polkadot/types/interfaces';
-import { DerivedStakingStash } from '../types';
-
-import { Observable } from 'rxjs';
-import { map } from 'rxjs/operators';
-import { Option } from '@polkadot/types';
-
-import { memo } from '../util';
-
-type Result = [Option<AccountId>, Nominations, RewardDestination, Exposure, ValidatorPrefs, Option<Keys>];
-
-function parse (stashId: AccountId, [_controllerId, nominators, rewardDestination, stakers, validatorPrefs, _nextKeys]: Result): DerivedStakingStash {
-  return {
-    controllerId: _controllerId.unwrapOr(undefined),
-    nextKeys: _nextKeys.unwrapOr(undefined),
-    nominators: nominators.targets,
-    nominateAt: nominators.submittedIn,
-    rewardDestination,
-    stakers,
-    stashId,
-    validatorPrefs
-  };
-}
-
-function query (api: ApiInterfaceRx, stashId: AccountId): Observable<Result> {
-  return api.queryMulti<Result>([
-    [api.query.staking.bonded, stashId],
-    [api.query.staking.nominators, stashId],
-    [api.query.staking.payee, stashId],
-    [api.query.staking.stakers, stashId],
-    [api.query.staking.validators, stashId],
-    [api.query.session.nextKeys, [api.consts.session.dedupKeyPrefix, stashId]]
-  ]);
-}
-
-export function infoStash (api: ApiInterfaceRx): (stashId: AccountId) => Observable<DerivedStakingStash> {
-  return memo((stashId: AccountId): Observable<DerivedStakingStash> =>
-    query(api, stashId).pipe(
-      map((result): DerivedStakingStash => parse(stashId, result))
-    ));
-}