Merge branch '337432-remove-of_milestones-scope' into 'master'

Remove unused of_milestones scope

See merge request gitlab-org/gitlab!73926

app/models/concerns/milestoneable.rb

@@ -14,7 +14,6 @@ module Milestoneable
 
     validate :milestone_is_valid
 
-    scope :of_milestones, ->(ids) { where(milestone_id: ids) }
     scope :any_milestone, -> { where.not(milestone_id: nil) }
     scope :with_milestone, ->(title) { left_joins_milestones.where(milestones: { title: title }) }
     scope :without_particular_milestone, ->(title) { left_outer_joins(:milestone).where("milestones.title != ? OR milestone_id IS NULL", title) }