Fix #4148: Don't prune votes.

app/logical/danbooru_maintenance.rb

@@ -11,8 +11,6 @@ module DanbooruMaintenance
     PostPruner.new.prune!
     Upload.where('created_at < ?', 1.day.ago).delete_all
     Delayed::Job.where('created_at < ?', 45.days.ago).delete_all
-    PostVote.prune!
-    CommentVote.prune!
     PostDisapproval.prune!
     ForumSubscription.process_all!
     TagAlias.update_cached_post_counts_for_all

app/models/comment_vote.rb

@@ -10,10 +10,6 @@ class CommentVote < ApplicationRecord
   validate :validate_comment_can_be_down_voted
   validates_inclusion_of :score, :in => [-1, 1], :message => "must be 1 or -1"
 
-  def self.prune!
-    where("created_at < ?", 14.days.ago).delete_all
-  end
-
   def self.search(params)
     q = where("true")
     return q if params.blank?

app/models/post_vote.rb

@@ -11,10 +11,6 @@ class PostVote < ApplicationRecord
   after_create :update_post_on_create
   after_destroy :update_post_on_destroy
 
-  def self.prune!
-    where("created_at < ?", 90.days.ago).delete_all
-  end
-
   def self.positive_user_ids
     select_values_sql("select user_id from post_votes where score > 0 group by user_id having count(*) > 100")
   end