Fix linter errors and remove coverage.json

packages/contracts/src/utils/web3_wrapper.ts

@@ -2,13 +2,12 @@ import { devConstants, env, EnvVars, web3Factory } from '@0xproject/dev-utils';
 import { prependSubprovider } from '@0xproject/subproviders';
 import { logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as _ from 'lodash';
 
 import { coverage } from './coverage';
 import { profiler } from './profiler';
 import { revertTrace } from './revert_trace';
 
-import * as _ from 'lodash';
-
 enum ProviderType {
     Ganache = 'ganache',
     Geth = 'geth',