diff --git a/tool/lib/envutil.rb b/tool/lib/envutil.rb
index 0bd8bdbc2c..860ab30689 100644
--- a/tool/lib/envutil.rb
+++ b/tool/lib/envutil.rb
@@ -197,11 +197,6 @@ module EnvUtil
   end
   module_function :invoke_ruby
 
-  alias rubyexec invoke_ruby
-  class << self
-    alias rubyexec invoke_ruby
-  end
-
   def verbose_warning
     class << (stderr = "".dup)
       alias write concat