Fix rubocop offences

app/controllers/projects/settings/slacks_controller.rb

@@ -24,8 +24,7 @@ module Projects
       private
 
       def redirect_to_service_page
-        redirect_to edit_namespace_project_service_path(
-          project.namespace,
+        redirect_to edit_project_service_path(
           project,
           project.gitlab_slack_application_service || project.build_gitlab_slack_application_service
         )

app/helpers/auth_helper.rb

@@ -75,7 +75,7 @@ module AuthHelper
   end
 
   def slack_redirect_uri(project)
-    slack_auth_namespace_project_settings_slack_url(project.namespace, project)
+    slack_auth_project_settings_slack_url(project)
   end
 
   extend self

app/models/project.rb

@@ -89,7 +89,7 @@ class Project < ActiveRecord::Base
   # Project services
   has_one :campfire_service
   has_one :drone_ci_service
-  has_one :gitlab_slack_application_service, dependent: :destroy
+  has_one :gitlab_slack_application_service
   has_one :emails_on_push_service
   has_one :pipelines_email_service
   has_one :irker_service

app/services/projects/slack_application_install_service.rb

@@ -55,7 +55,7 @@ module Projects
       HTTParty.get(SLACK_EXCHANGE_TOKEN_URL, query: {
         client_id: current_application_settings.slack_app_id,
         client_secret: current_application_settings.slack_app_secret,
-        redirect_uri: slack_auth_namespace_project_settings_slack_url(project.namespace, project),
+        redirect_uri: slack_auth_project_settings_slack_url(project),
         code: params[:code]
       })
     end

spec/controllers/projects/settings/slacks_controller_spec.rb

@@ -11,8 +11,7 @@ describe Projects::Settings::SlacksController do
 
   describe 'GET show' do
     def redirect_url(project)
-      edit_namespace_project_service_path(
-        project.namespace,
+      edit_project_service_path(
         project,
         project.build_gitlab_slack_application_service
       )