Remove deprecated attributes from Budget::Phase

Some fields from Budget::Phase are translatable and we no longer need them. This commit will remove the annoying deprecation warning thrown by Globalize gem after gem version update.

db/migrate/20190325185550_remove_deprecated_translatable_fields_from_budget_phases.rb

@@ -0,0 +1,6 @@
+class RemoveDeprecatedTranslatableFieldsFromBudgetPhases < ActiveRecord::Migration[4.2]
+  def change
+    remove_column :budget_phases, :summary, :text
+    remove_column :budget_phases, :description, :text
+  end
+end

db/schema.rb

@@ -297,8 +297,6 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.integer  "budget_id"
     t.integer  "next_phase_id"
     t.string   "kind",                         null: false
-    t.text     "summary"
-    t.text     "description"
     t.datetime "starts_at"
     t.datetime "ends_at"
     t.boolean  "enabled",       default: true