Fix and remove leftover

Author: AndriiMysko

lib/travis/api/v3/queries/v2_addon_usages.rb

@@ -1,10 +1,10 @@
 module Travis::API::V3
   class Queries::V2AddonUsages < Query
     def all(user_id)
+      return unless params['subscription.id']
+
       client = BillingClient.new(user_id)
-      if params['subscription.id']
-        client.v2_subscription_user_usages(params['subscription.id'])
-      end
+      client.v2_subscription_user_usages(params['subscription.id'])
     end
   end
 end

lib/travis/api/v3/queries/v2_subscription.rb

@@ -28,11 +28,6 @@ def buy_addon(user_id)
       client.purchase_addon(params['subscription.id'], params['addon.id'])
     end
 
-    def user_usages(user_id)
-      client = BillingClient.new(user_id)
-      client.v2_subscription_user_usages(params['subscription.id'])
-    end
-
     def invoices(user_id)
       client = BillingClient.new(user_id)
       client.get_invoices_for_v2_subscription(params['subscription.id'])