[#4420] Remove Deliverable#frequency, assumed to be monthly.

db/migrate/014_remove_frequency_from_deliverables.rb

@@ -0,0 +1,9 @@
+class RemoveFrequencyFromDeliverables < ActiveRecord::Migration
+  def self.up
+    remove_column :deliverables, :frequency
+  end
+
+  def self.down
+    add_column :deliverables, :frequency, :string
+  end
+end