[Track Config]: Removed duplicates and extra (unused) concepts from config.json. (#4205)

* Removed duplicates and extra (unused) concepts from config.json.

* Added back in unused concepts to statisfy CI.  Will rename or remove later.

Author: BethanyG

config.json

@@ -2424,11 +2424,6 @@
       "slug": "enums",
       "name": "Enums"
     },
-    {
-      "uuid": "8ac7c6b5-5786-45dd-8ce3-5b139da06471",
-      "slug": "fractions",
-      "name": "Fractions"
-    },
     {
       "uuid": "26b147e0-2cdc-4325-a6b4-6a2dd5bb69b1",
       "slug": "function-arguments",