Reduce Array assignment by not giving a name for unused `*args`

actionpack/lib/abstract_controller/callbacks.rb

@@ -37,7 +37,7 @@ module AbstractController
 
     # Override <tt>AbstractController::Base#process_action</tt> to run the
     # <tt>process_action</tt> callbacks around the normal behavior.
-    def process_action(*args)
+    def process_action(*)
       run_callbacks(:process_action) do
         super
       end

actionpack/lib/action_controller/metal/instrumentation.rb

@@ -16,7 +16,7 @@ module ActionController
 
     attr_internal :view_runtime
 
-    def process_action(*args)
+    def process_action(*)
       raw_payload = {
         controller: self.class.name,
         action: action_name,
@@ -38,7 +38,7 @@ module ActionController
       end
     end
 
-    def render(*args)
+    def render(*)
       render_output = nil
       self.view_runtime = cleanup_view_runtime do
         Benchmark.ms { render_output = super }
@@ -59,7 +59,7 @@ module ActionController
       end
     end
 
-    def redirect_to(*args)
+    def redirect_to(*)
       ActiveSupport::Notifications.instrument("redirect_to.action_controller") do |payload|
         result = super
         payload[:status]   = response.status

actionpack/lib/action_controller/metal/params_wrapper.rb

@@ -240,7 +240,7 @@ module ActionController
 
     # Performs parameters wrapping upon the request. Called automatically
     # by the metal call stack.
-    def process_action(*args)
+    def process_action(*)
       _perform_parameter_wrapping if _wrapper_enabled?
       super
     end

actionpack/lib/action_controller/metal/rescue.rb

@@ -18,7 +18,7 @@ module ActionController #:nodoc:
     end
 
     private
-      def process_action(*args)
+      def process_action(*)
         super
       rescue Exception => exception
         request.env["action_dispatch.show_detailed_exceptions"] ||= show_detailed_exceptions?