Remove useless "regimen" column from sequence table

app/models/sequence.rb

@@ -1,6 +1,6 @@
 class Sequence < ActiveRecord::Base
   belongs_to :device
-  belongs_to :regimen, class_name: "Regimen"
+  # belongs_to :regimen, class_name: "Regimen"
   has_many :steps
   has_many :regimen_items
 
@@ -16,5 +16,4 @@ class Sequence < ActiveRecord::Base
   def init
     self.color ||= COLORS.sample
   end
-
 end

db/migrate/20161006154039_remove_schedule_id_from_sequence.rb

@@ -1,5 +1,6 @@
 class RemoveScheduleIdFromSequence < ActiveRecord::Migration
   def change
     remove_column :sequences, :schedule_id, :integer
+    remove_column :sequences, :regimen, :string
   end
 end

db/schema.rb

@@ -63,7 +63,6 @@ ActiveRecord::Schema.define(version: 20161006154039) do
 
   create_table "sequences", force: :cascade do |t|
     t.integer "device_id", limit: 4
-    t.string  "regimen",   limit: 255
     t.string  "name",      limit: 255
     t.string  "color",     limit: 255
   end