config.json in trackler-2.2.0.5

- old
+ new

@@ -1,8 +1,6 @@
 {
-  "slug": "haskell",
   "language": "Haskell",
-  "repository": "https://github.com/exercism/haskell",
   "active": true,
   "exercises": [
     {
       "uuid": "c97d9dda-c7ee-4595-b447-693559d03ba5",
       "slug": "hello-world",