diff --git a/app/assets/config/manifest.js b/app/assets/config/manifest.js
deleted file mode 100644
index 9b9c1130f..000000000
--- a/app/assets/config/manifest.js
+++ /dev/null
@@ -1,8 +0,0 @@
-// This is the config file for Sprockets. Danbooru doesn't use Sprockets, but
-// we still need this file anyway because the derailed_benchmarks gem doesn't
-// work without it. derailed_benchmarks does `require "rails/all"`, which loads
-// Sprockets, which fails if this config file isn't present.
-//
-// https://github.com/rails/sprockets-rails/issues/444
-// https://github.com/zombocom/derailed_benchmarks
-{}
diff --git a/config/application.rb b/config/application.rb
index 39d354b38..2f39d19be 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -17,7 +17,6 @@ require "active_job/railtie"
 # require "action_mailbox/engine"
 # require "action_text/engine"
 require "rails/test_unit/railtie"
-# require "sprockets/railtie"
 
 # Load the gems for the current Rails environment from the Gemfile.
 Bundler.require(*Rails.groups)