diff --git a/challenges/object-oriented-and-functional-programming.json b/challenges/object-oriented-and-functional-programming.json
index aad1e5756c..46b02355a2 100644
--- a/challenges/object-oriented-and-functional-programming.json
+++ b/challenges/object-oriented-and-functional-programming.json
@@ -215,9 +215,6 @@
         "",
         "(function() {return newArray;})();"
       ],
-      "MDNlinks":[
-        "Array.map()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     },
@@ -252,9 +249,6 @@
         "",
         "(function() {return singleVal;})();"
       ],
-      "MDNlinks":[
-        "Array.reduce()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     },
@@ -288,9 +282,6 @@
         "",
         "(function() { return newArray; })();"
       ],
-      "MDNlinks":[
-        "Array.filter()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     },
@@ -324,9 +315,6 @@
         "",
         "(function() { return array; })();"
       ],
-      "MDNlinks":[
-        "Array.sort()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     },
@@ -354,9 +342,6 @@
         "",
         "(function() {return array;})();"
       ],
-      "MDNlinks":[
-        "Array.reverse()"
-      ],
       "challengeType": 1,
       "type": "waypoint"
     },
@@ -388,9 +373,6 @@
         "",
         "(function() { return newArray; })();"
       ],
-      "MDNlinks":[
-        "Array.concat()"
-      ],
       "challengeType": 1,
       "type": "waypoint"
     },
@@ -419,9 +401,6 @@
         "",
         "(function() {return array;})();"
       ],
-      "MDNlinks":[
-        "String.split()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     },
@@ -451,9 +430,6 @@
         "",
         "(function() {return joinedString;})();"
       ],
-      "MDNlinks":[
-        "Array.join()"
-      ],
       "challengeType":1,
       "type": "waypoint"
     }