Fix linting errors

packages/instant/src/components/instant_heading.tsx

@@ -33,7 +33,6 @@ const ICON_COLOR = ColorOption.white;
 
 export class InstantHeading extends React.PureComponent<InstantHeadingProps, {}> {
     public render(): React.ReactNode {
-        const { selectedAsset } = this.props;
         return this._renderAssetHeadingContent();
     }
 
@@ -50,7 +49,7 @@ export class InstantHeading extends React.PureComponent<InstantHeadingProps, {}>
         }
         return null;
     }
-
+    // tslint:disable-next-line:prefer-function-over-method
     private _renderERC721AssetHeading(asset: ERC721Asset): React.ReactNode {
         return (
             <Container width="100%" padding="30px 0px 0px">

packages/instant/src/components/ui/image.tsx

@@ -1,6 +1,6 @@
 import * as React from 'react';
 
-import { ColorOption, styled } from '../../style/theme';
+import { styled } from '../../style/theme';
 
 export interface ImageProps extends React.HTMLAttributes<HTMLImageElement> {
     rounded?: boolean;

packages/instant/src/components/zero_ex_instant_provider.tsx

@@ -1,3 +1,4 @@
+import { AssetProxyId } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import * as _ from 'lodash';
 import * as React from 'react';
@@ -18,7 +19,6 @@ import { gasPriceEstimator } from '../util/gas_price_estimator';
 import { Heartbeater } from '../util/heartbeater';
 import { generateAccountHeartbeater, generateBuyQuoteHeartbeater } from '../util/heartbeater_factory';
 import { providerStateFactory } from '../util/provider_state_factory';
-import { AssetProxyId } from '@0x/types';
 
 export type ZeroExInstantProviderProps = ZeroExInstantBaseConfig;
 

packages/instant/src/redux/async_data.ts

@@ -1,10 +1,9 @@
-import { AssetProxyId } from '@0x/types';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 import { Dispatch } from 'redux';
 
 import { BIG_NUMBER_ZERO } from '../constants';
-import { AccountState, BaseCurrency, ERC20Asset, OrderProcessState, ProviderState, QuoteFetchOrigin } from '../types';
+import { AccountState, BaseCurrency, OrderProcessState, ProviderState, QuoteFetchOrigin } from '../types';
 import { analytics } from '../util/analytics';
 import { assetUtils } from '../util/asset';
 import { buyQuoteUpdater } from '../util/buy_quote_updater';