remove class_parameter_defaults disable

This check has been removed since puppet-lint 1.0.0 [1]

[1] puppetlabs/puppet-lint@4f26f5b

Author: waipeng

lib/puppetlabs_spec_helper/rake_tasks.rb

@@ -170,7 +170,6 @@
   80chars
   140chars
   class_inherits_from_params_class
-  class_parameter_defaults
   disable_autoloader_layout
   documentation
   single_quote_string_with_variables