Code cleanup

Cleanup for `ActionDispatch::Http::Parameters` - no need for required libraries
and remove not used private method.

Apparently this method was used in `ActionDispatch::Http::Request` - fixed
by calling `Request::Utils` explicitly (as was done in other parts of the codebase)

actionpack/lib/action_dispatch/http/parameters.rb

-require 'active_support/core_ext/hash/keys'
-require 'active_support/core_ext/hash/indifferent_access'
-
 module ActionDispatch
   module Http
     module Parameters
@@ -34,14 +31,6 @@ def path_parameters=(parameters) #:nodoc:
       def path_parameters
         get_header(PARAMETERS_KEY) || {}
       end
-
-    private
-
-      # Convert nested Hash to HashWithIndifferentAccess.
-      #
-      def normalize_encode_params(params)
-        ActionDispatch::Request::Utils.normalize_encode_params params
-      end
     end
   end
 end

actionpack/lib/action_dispatch/http/request.rb

@@ -332,7 +332,7 @@ def session_options=(options)
     # Override Rack's GET method to support indifferent access
     def GET
       get_header("action_dispatch.request.query_parameters") do |k|
-        set_header k, normalize_encode_params(super || {})
+        set_header k, Request::Utils.normalize_encode_params(super || {})
       end
     rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
       raise ActionController::BadRequest.new(:query, e)
@@ -342,7 +342,7 @@ def GET
     # Override Rack's POST method to support indifferent access
     def POST
       get_header("action_dispatch.request.request_parameters") do
-        self.request_parameters = normalize_encode_params(super || {})
+        self.request_parameters = Request::Utils.normalize_encode_params(super || {})
       end
     rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
       raise ActionController::BadRequest.new(:request, e)