1 files changed, 1 insertions, 20 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/stack.rb b/actionpack/lib/action_dispatch/middleware/stack.rb
index 466eb8b3f1..6949b31e75 100644
--- a/actionpack/lib/action_dispatch/middleware/stack.rb
+++ b/actionpack/lib/action_dispatch/middleware/stack.rb
@@ -88,7 +88,6 @@ module ActionDispatch
     end
 
     def delete(target)
-      target = get_class target
       middlewares.delete_if { |m| m.klass == target }
     end
 
@@ -103,31 +102,13 @@ module ActionDispatch
     private
 
       def assert_index(index, where)
-        index = get_class index
         i = index.is_a?(Integer) ? index : middlewares.index { |m| m.klass == index }
         raise "No such middleware to insert #{where}: #{index.inspect}" unless i
         i
       end
 
-      def get_class(klass)
-        if klass.is_a?(String) || klass.is_a?(Symbol)
-          classcache = ActiveSupport::Dependencies::Reference
-          converted_klass = classcache[klass.to_s]
-          ActiveSupport::Deprecation.warn <<-eowarn
-Passing strings or symbols to the middleware builder is deprecated, please change
-them to actual class references.  For example:
-
-  "#{klass}" => #{converted_klass}
-
-          eowarn
-          converted_klass
-        else
-          klass
-        end
-      end
-
       def build_middleware(klass, args, block)
-        Middleware.new(get_class(klass), args, block)
+        Middleware.new(klass, args, block)
       end
   end
 end