fix: remove min/maxItems from type

We keep it in the outer boundary

Author: jbergstroem

topsort-api-v2.yml

@@ -1003,8 +1003,6 @@ components:
         - $ref: "#/components/schemas/BannersAuction"
       discriminator:
         propertyName: "type"
-      minItems: 1
-      maxItems: 5
     RankingRequest:
       type: object
       description: |