fix eslint issue picked up by codeclimate

frontend/src/components/Maps/MapCard.js

@@ -1,7 +1,6 @@
 import React, { Component, PropTypes } from 'react'
 import { Link } from 'react-router'
 import { find, values } from 'lodash'
-import Util from '../../Metamaps/Util'
 
 const IN_CONVERSATION = 1 // shared with /realtime/reducer.js
 

frontend/src/components/TopicCard/index.js

@@ -6,7 +6,6 @@ import Links from './Links'
 import Desc from './Desc'
 import Attachments from './Attachments'
 import Follow from './Follow'
-import Util from '../../Metamaps/Util'
 
 class ReactTopicCard extends Component {
   render = () => {