Remove unused columns from poll options (#7124)

Co-authored-by: Ben Halpern <bendhalpern@gmail.com>

app/models/poll_option.rb

@@ -1,8 +1,4 @@
 class PollOption < ApplicationRecord
-  self.ignored_columns = %w[
-    counts_in_tabulation
-  ]
-
   belongs_to :poll
   has_many :poll_votes
 

db/migrate/20200407081312_remove_unused_columns_from_poll_options.rb

@@ -0,0 +1,7 @@
+class RemoveUnusedColumnsFromPollOptions < ActiveRecord::Migration[5.2]
+  def change
+    safety_assured do
+      remove_column :poll_options, :counts_in_tabulation, :boolean
+    end
+  end
+end

db/schema.rb

@@ -820,7 +820,6 @@ ActiveRecord::Schema.define(version: 2020_04_07_091449) do
   end
 
   create_table "poll_options", force: :cascade do |t|
-    t.boolean "counts_in_tabulation"
     t.datetime "created_at", null: false
     t.string "markdown"
     t.bigint "poll_id"