Use autoload

lib/cocoapods.rb

@@ -49,6 +49,7 @@ module Pod
   autoload :Project,                   'cocoapods/project'
   autoload :Resolver,                  'cocoapods/resolver'
   autoload :Sandbox,                   'cocoapods/sandbox'
+  autoload :SimControl,                'cocoapods/simctl'
   autoload :SourcesManager,            'cocoapods/sources_manager'
   autoload :Target,                    'cocoapods/target'
   autoload :Validator,                 'cocoapods/validator'

lib/cocoapods/validator.rb

 require 'active_support/core_ext/array'
 require 'active_support/core_ext/string/inflections'
-require 'cocoapods/simctl'
 
 module Pod
   # Validates a Specification.