diff --git a/lib/twitter-ads/campaign/line_item.rb b/lib/twitter-ads/campaign/line_item.rb
index dac6a598..5142e40e 100644
--- a/lib/twitter-ads/campaign/line_item.rb
+++ b/lib/twitter-ads/campaign/line_item.rb
@@ -85,16 +85,5 @@ def targeting_criteria(id = nil, opts = {})
       id ? TargetingCriteria.load(account, id, opts) : TargetingCriteria.all(account, @id, opts)
     end
 
-    def to_params
-      params = super
-
-      # If automatically_set_bid is set, bid_type must not be set.
-      params.delete(:bid_type) if params[:automatically_select_bid]
-
-      # advertiser_user_id is currently beta-only and causes an error when sent.
-      params.delete(:advertiser_user_id)
-
-      params
-    end
   end
 end