Remove configuration option from project settings page for external issue trackers.

app/helpers/projects_helper.rb

@@ -72,18 +72,6 @@ module ProjectsHelper
     @project.milestones.active.order("due_date, title ASC")
   end
 
-  def project_issues_trackers(current_tracker = nil)
-    values = Project.issues_tracker.values.map do |tracker_key|
-      if tracker_key.to_sym == :gitlab
-        ['GitLab', tracker_key]
-      else
-        [Gitlab.config.issues_tracker[tracker_key]['title'] || tracker_key, tracker_key]
-      end
-    end
-
-    options_for_select(values, current_tracker)
-  end
-
   def link_to_toggle_star(title, starred, signed_in)
     cls = 'star-btn'
     cls += ' disabled' unless signed_in

app/models/project.rb

@@ -137,7 +137,7 @@ class Project < ActiveRecord::Base
   scope :public_and_internal_only, -> { where(visibility_level: Project.public_and_internal_levels) }
   scope :non_archived, -> { where(archived: false) }
 
-  enumerize :issues_tracker, in: (Gitlab.config.issues_tracker.keys).append(:gitlab), default: :gitlab
+  enumerize :issues_tracker, in: (Service.issue_tracker_service_list).append(:gitlab), default: :gitlab
 
   state_machine :import_status, initial: :none do
     event :import_start do

app/models/service.rb

@@ -86,4 +86,12 @@ class Service < ActiveRecord::Base
   def async_execute(data)
     Sidekiq::Client.enqueue(ProjectServiceWorker, id, data)
   end
+
+  def issue_tracker?
+    self.category == :issue_tracker
+  end
+
+  def self.issue_tracker_service_list
+    Service.select(&:issue_tracker?).map{ |s| s.to_param }
+  end
 end

app/views/projects/edit.html.haml

@@ -50,15 +50,6 @@
                   = f.check_box :issues_enabled
                   %span.descr Lightweight issue tracking system for this project
 
-            - if Project.issues_tracker.values.count > 1
-              .form-group
-                = f.label :issues_tracker, "Issues tracker", class: 'control-label'
-                .col-sm-10= f.select(:issues_tracker, project_issues_trackers(@project.issues_tracker), {}, { disabled: !@project.issues_enabled })
-
-              .form-group
-                = f.label :issues_tracker_id, "Project name or id in issues tracker", class: 'control-label'
-                .col-sm-10= f.text_field :issues_tracker_id, disabled: !@project.can_have_issues_tracker_id?, class: 'form-control'
-
             .form-group
               = f.label :merge_requests_enabled, "Merge Requests", class: 'control-label'
               .col-sm-10