Revert "Only show download for MM challenge type, not tag"

This reverts commit 5061db9.

# Conflicts:
#	src/shared/components/challenge-detail/Submissions/index.jsx

Author: jmgasper

src/shared/components/challenge-detail/Submissions/index.jsx

@@ -6,7 +6,7 @@
 import React from 'react';
 import PT from 'prop-types';
 import moment from 'moment';
-import { isMM as checkIsMM, isMMByType as checkIsMMByType } from 'utils/challenge';
+import { isMM as checkIsMM } from 'utils/challenge';
 import _ from 'lodash';
 import { connect } from 'react-redux';
 import { config } from 'topcoder-react-utils';
@@ -604,7 +604,7 @@ class SubmissionsComponent extends React.Component {
           }
           {
             ((numWinners > 0 || challenge.status === CHALLENGE_STATUS.COMPLETED)
-            && checkIsMMByType(challenge) && isLoggedIn) && (
+            && isMM && isLoggedIn) && (
               <div styleName="block-download-all">
                 <button
                   disabled={downloadingAll}

src/shared/utils/challenge.js

@@ -13,14 +13,6 @@ export function isMM(challenge) {
   return tags.includes('Marathon Match') || isMMType;
 }
 
-/**
- * check if is marathon match challenge by type only (ignore MM tags)
- * @param {Object} challenge challenge object
- */
-export function isMMByType(challenge) {
-  const isMMType = challenge ? challenge.type === 'Marathon Match' : false;
-  return isMMType;
-}
 /**
  * Set challenge type to challenge
  * @param {Object} challenges challenge object
@@ -37,6 +29,5 @@ export function updateChallengeType(challenges, challengeTypeMap) {
 
 export default {
   isMM,
-  isMMByType,
   updateChallengeType,
 };