FIX: Fix test suite when discourse-assign is plugged-in

FIX: Fix test suite when discourse-assign is plugged-in

diff --git a/spec/requests/discourse_code_review/code_review_controller_spec.rb b/spec/requests/discourse_code_review/code_review_controller_spec.rb
index 6b020ca..663f4d7 100644
--- a/spec/requests/discourse_code_review/code_review_controller_spec.rb
+++ b/spec/requests/discourse_code_review/code_review_controller_spec.rb
@@ -218,7 +218,7 @@ describe DiscourseCodeReview::CodeReviewController do
     SiteSetting.code_review_allow_self_approval = true
 
     default_allowed_group = Group.find_by(name: 'staff')
-    Fabricate(:group_user, user: user, group: default_allowed_group)
+    Fabricate(:group_user, group: default_allowed_group)
 
     commit = create_post(raw: "this is a fake commit", user: signed_in_user, tags: ["hi", SiteSetting.code_review_pending_tag])

GitHub sha: 359233e1