removes poll-booth direct association

app/models/poll.rb

@@ -1,5 +1,4 @@
 class Poll < ActiveRecord::Base
-  has_many :booths
   has_many :voters, through: :booths, class_name: "Poll::Voter"
   has_many :officers, through: :booths, class_name: "Poll::Officer"
   has_many :questions

app/models/poll/booth.rb

@@ -1,6 +1,5 @@
 class Poll
   class Booth < ActiveRecord::Base
-    belongs_to :poll
     has_many :voters
     has_many :officing_booths, dependent: :destroy
     has_many :officers, through: :officing_booths

db/migrate/20161130122604_remove_poll_id_from_booth.rb

@@ -0,0 +1,5 @@
+class RemovePollIdFromBooth < ActiveRecord::Migration
+  def change
+    remove_column :poll_booths, :poll_id, :integer
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20161129011737) do
+ActiveRecord::Schema.define(version: 20161130122604) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -279,9 +279,8 @@ ActiveRecord::Schema.define(version: 20161129011737) do
   add_index "organizations", ["user_id"], name: "index_organizations_on_user_id", using: :btree
 
   create_table "poll_booths", force: :cascade do |t|
-    t.string  "name"
-    t.integer "poll_id"
-    t.string  "location"
+    t.string "name"
+    t.string "location"
   end
 
   create_table "poll_officers", force: :cascade do |t|