fix linting error

Author: horike37

lib/deploy/events/apiGateway/iamRole.test.js

@@ -4,7 +4,6 @@ const expect = require('chai').expect;
 const Serverless = require('serverless/lib/Serverless');
 const AwsProvider = require('serverless/lib/plugins/aws/provider/awsProvider');
 const ServerlessStepFunctions = require('./../../../index');
-const path = require('path');
 
 describe('#compileHttpIamRole()', () => {
   let serverless;