diff --git a/Library/Homebrew/cask/utils.rb b/Library/Homebrew/cask/utils.rb
index e47510ca3c..c512e898d6 100644
--- a/Library/Homebrew/cask/utils.rb
+++ b/Library/Homebrew/cask/utils.rb
@@ -2,9 +2,7 @@
 # frozen_string_literal: true
 
 require "utils/user"
-require "yaml"
 require "open3"
-require "stringio"
 
 BUG_REPORTS_URL = "https://github.com/Homebrew/homebrew-cask#reporting-bugs"