config.json in trackler-2.2.1.3

- old
+ new

@@ -1,8 +1,6 @@
 {
-  "slug": "scala",
   "language": "Scala",
-  "repository": "https://github.com/exercism/scala",
   "active": true,
   "exercises": [
     {
       "uuid": "1fadd9c3-a7c9-4355-aef9-82e0df3d45b9",
       "slug": "hello-world",