Remove deprecated ActionDispatch::Http::Parameters#symbolized_path_parameters

Author: rafaelfranca

Diff for: actionpack/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated `ActionDispatch::Http::Parameters#symbolized_path_parameters`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated option `use_route` in controller tests.
 
     *Rafael Mendonça França*

Diff for: actionpack/lib/action_dispatch/http/parameters.rb

@@ -1,6 +1,5 @@
 require 'active_support/core_ext/hash/keys'
 require 'active_support/core_ext/hash/indifferent_access'
-require 'active_support/deprecation'
 
 module ActionDispatch
   module Http
@@ -25,13 +24,6 @@ def path_parameters=(parameters) #:nodoc:
         @env[PARAMETERS_KEY] = parameters
       end
 
-      def symbolized_path_parameters
-        ActiveSupport::Deprecation.warn(
-          '`symbolized_path_parameters` is deprecated. Please use `path_parameters`.'
-        )
-        path_parameters
-      end
-
       # Returns a hash with the \parameters used to form the \path of the request.
       # Returned hash keys are strings:
       #