Removed duplicate require ‘models/computer’

activerecord/test/cases/associations/belongs_to_associations_test.rb

 require 'cases/helper'
 require 'models/developer'
-require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/topic'

activerecord/test/cases/associations_test.rb

 require "cases/helper"
 require 'models/computer'
 require 'models/developer'
-require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/categorization'

activerecord/test/cases/attribute_methods_test.rb

 require "cases/helper"
 require 'models/minimalistic'
 require 'models/developer'
-require 'models/computer'
 require 'models/auto_id'
 require 'models/boolean'
 require 'models/computer'

activerecord/test/cases/fixtures_test.rb

@@ -11,7 +11,6 @@
 require 'models/computer'
 require 'models/course'
 require 'models/developer'
-require 'models/computer'
 require 'models/joke'
 require 'models/matey'
 require 'models/parrot'