Move Ci::Build#available_statuses to AVAILABLE_STATUSES constant in CommitStatus

app/models/ci/build.rb

@@ -97,10 +97,6 @@ module Ci
         new_build.save
         new_build
       end
-
-      def available_statuses
-        state_machines[:status].states.map &:value
-      end
     end
 
     state_machine :status, initial: :pending do

app/models/commit_status.rb

@@ -56,6 +56,8 @@ class CommitStatus < ActiveRecord::Base
   scope :ordered, -> { order(:ref, :stage_idx, :name) }
   scope :for_ref, ->(ref) { where(ref: ref) }
 
+  AVAILABLE_STATUSES = ['pending', 'running', 'success', 'failed', 'canceled']
+
   state_machine :status, initial: :pending do
     event :run do
       transition pending: :running

lib/api/builds.rb

@@ -125,7 +125,7 @@ module API
       def filter_builds(builds, scope)
         return builds if scope.nil? || scope.empty?
 
-        available_statuses = Ci::Build.available_statuses
+        available_statuses = ::CommitStatus::AVAILABLE_STATUSES
         scope =
           if scope.is_a?(String)
             [scope]