Updated CUSTOMIZE.md references to archive layout

Signed-off-by: George Araújo <[email protected]>

Author: george-gca

CUSTOMIZE.md

@@ -183,9 +183,7 @@ You can also:
 
 - delete [\_includes/latest_posts.liquid](_includes/latest_posts.liquid)
 - delete [\_includes/related_posts.liquid](_includes/related_posts.liquid)
-- delete [\_layouts/archive-category.liquid](_layouts/archive-category.liquid)
-- delete [\_layouts/archive-tag.liquid](_layouts/archive-tag.liquid)
-- delete [\_layouts/archive-year.liquid](_layouts/archive-year.liquid)
+- delete [\_layouts/archive.liquid](_layouts/archive.liquid)
 - delete [\_plugins/external-posts.rb](_plugins/external-posts.rb)
 - remove the `jekyll-archives` gem from the [Gemfile](Gemfile) and the `plugins` section in [\_config.yml](_config.yml)
 - remove the `classifier-reborn` gem from the [Gemfile](Gemfile)