Fix lint errors

packages/order-utils/src/exchange_transfer_simulator.ts

@@ -1,4 +1,4 @@
-import { AssetProxyId, ExchangeContractErrs } from '@0xproject/types';
+import { ExchangeContractErrs } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 
 import { AbstractBalanceAndProxyAllowanceLazyStore } from './abstract/abstract_balance_and_proxy_allowance_lazy_store';
@@ -90,7 +90,6 @@ export class ExchangeTransferSimulator {
         userAddress: string,
         amountInBaseUnits: BigNumber,
     ): Promise<void> {
-        const assetProxyId = assetProxyUtils.decodeAssetDataId(assetData);
         const proxyAllowance = await this._store.getProxyAllowanceAsync(assetData, userAddress);
         // HACK: This code assumes that all tokens with an UNLIMITED_ALLOWANCE_IN_BASE_UNITS set,
         // are UnlimitedAllowanceTokens. This is however not true, it just so happens that all

packages/order-utils/src/order_state_utils.ts

@@ -7,7 +7,6 @@ import {
     SignedOrder,
 } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
-import * as _ from 'lodash';
 
 import { AbstractBalanceAndProxyAllowanceFetcher } from './abstract/abstract_balance_and_proxy_allowance_fetcher';
 import { AbstractOrderFilledCancelledFetcher } from './abstract/abstract_order_filled_cancelled_fetcher';

packages/order-utils/src/order_validation_utils.ts

@@ -1,5 +1,4 @@
-import { Order, SignedOrder } from '@0xproject/types';
-import { RevertReasons } from '@0xproject/types';
+import { RevertReasons, SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Provider } from 'ethereum-types';
 import * as _ from 'lodash';