Remove ApplicationController.helpers for append_tags (#1516)

Author: pulkitkkr

lib/react_on_rails/helper.rb

@@ -328,8 +328,8 @@ def load_pack_for_component(component_name)
 
       ReactOnRails::WebpackerUtils.raise_nested_entries_disabled unless ReactOnRails::WebpackerUtils.nested_entries?
 
-      ApplicationController.helpers.append_javascript_pack_tag "generated/#{component_name}"
-      ApplicationController.helpers.append_stylesheet_pack_tag "generated/#{component_name}"
+      append_javascript_pack_tag "generated/#{component_name}"
+      append_stylesheet_pack_tag "generated/#{component_name}"
     end
 
     def generated_components_pack_path(component_name)