Remove unnecessary model requires

activerecord/test/cases/base_test.rb

@@ -14,7 +14,6 @@
 require 'models/boolean'
 require 'models/column_name'
 require 'models/subscriber'
-require 'models/keyboard'
 require 'models/comment'
 require 'models/minimalistic'
 require 'models/warehouse_thing'
@@ -25,7 +24,6 @@
 require 'models/bird'
 require 'models/car'
 require 'models/bulb'
-require 'rexml/document'
 require 'concurrent/atomic/count_down_latch'
 
 class FirstAbstractClass < ActiveRecord::Base