Remove deprecated attribute from Comments

A field from Comment is deprecated and we no longer need it.

db/migrate/20200831112559_remove_deprecated_field_from_comments.rb

@@ -0,0 +1,5 @@
+class RemoveDeprecatedFieldFromComments < ActiveRecord::Migration[5.1]
+  def change
+    remove_column :comments, :deprecated_body, :text
+  end
+end

db/schema.rb

@@ -397,7 +397,6 @@ ActiveRecord::Schema.define(version: 20200908084257) do
   create_table "comments", id: :serial, force: :cascade do |t|
     t.integer "commentable_id"
     t.string "commentable_type"
-    t.text "deprecated_body"
     t.string "subject"
     t.integer "user_id", null: false
     t.datetime "created_at"