Revert "Merge branch 'master' of github.com:thogg4/grape into dynamic…

…-declared-class"

This reverts commit 4e5938f, reversing
changes made to 5278eca.

lib/grape/extensions/hashie/mash.rb

@@ -13,15 +13,10 @@ def params_builder
           end
 
           def build_params
-            params = Mash.new(rack_params)
+            params = ::Hashie::Mash.new(rack_params)
             params.deep_merge!(grape_routing_args) if env[Grape::Env::GRAPE_ROUTING_ARGS]
             params
           end
-
-          class Mash < ::Hashie::Mash
-            disable_warnings
-          end
-
         end
       end
     end