Fix linting errors

server/boot/challenge.js

@@ -35,12 +35,14 @@ const dasherize = utils.dasherize;
 const unDasherize = utils.unDasherize;
 const getMDNLinks = utils.getMDNLinks;
 
+/*
 function makeChallengesUnique(challengeArr) {
   // clone and reverse challenges
   // then filter by unique id's
   // then reverse again
   return _.uniq(challengeArr.slice().reverse(), 'id').reverse();
 }
+*/
 function numberWithCommas(x) {
   return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
 }
@@ -556,7 +558,7 @@ module.exports = function(app) {
           dashedName: dasherize(blockArray[0].block),
           challenges: blockArray,
           completed: completedCount / blockArray.length * 100,
-          time: blockArray[0] && blockArray[0].time || "???"
+          time: blockArray[0] && blockArray[0].time || '???'
         };
       })
       .filter(({ name }) => name !== 'Hikes')
@@ -579,7 +581,9 @@ module.exports = function(app) {
           res.render('challengeMap/show', {
             blocks,
             daysRunning,
-            globalCompletedCount: numberWithCommas(5612952 + (Math.floor((Date.now() - 1446268581061) / 3000))),
+            globalCompletedCount: numberWithCommas(
+              5612952 + (Math.floor((Date.now() - 1446268581061) / 3000))
+            ),
             camperCount,
             lastCompleted,
             title: "A map of all Free Code Camp's Challenges"