1 files changed, 0 insertions, 6 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index 231eaedbba..ba8d4acd6d 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -1,6 +1,5 @@
 require 'erb'
 require 'active_support/core_ext/kernel/singleton_class'
-require 'active_support/deprecation'
 
 class ERB
   module Util
@@ -190,11 +189,6 @@ module ActiveSupport #:nodoc:
       super(html_escape_interpolated_argument(value))
     end
 
-    def prepend!(value)
-      ActiveSupport::Deprecation.deprecation_warning "ActiveSupport::SafeBuffer#prepend!", :prepend
-      prepend value
-    end
-
     def +(other)
       dup.concat(other)
     end