3 files changed, 4 insertions, 17 deletions
diff --git a/actionpack/lib/action_controller/metal/rack_delegation.rb b/actionpack/lib/action_controller/metal/rack_delegation.rb
index e1bee9e60c..bdf6e88699 100644
--- a/actionpack/lib/action_controller/metal/rack_delegation.rb
+++ b/actionpack/lib/action_controller/metal/rack_delegation.rb
@@ -5,8 +5,8 @@ module ActionController
   module RackDelegation
     extend ActiveSupport::Concern
 
-    delegate :headers, :status=, :location=, :content_type=, :no_content_type=,
-             :status, :location, :content_type, :no_content_type, :to => "@_response"
+    delegate :headers, :status=, :location=, :content_type=,
+             :status, :location, :content_type, :to => "@_response"
 
     def dispatch(action, request)
       set_response!(request)
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index 3c4ef596c7..93e7d6954c 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -45,9 +45,7 @@ module ActionController
     def _process_format(format, options = {})
       super
 
-      if options[:body]
-        self.headers.delete "Content-Type"
-      elsif options[:plain]
+      if options[:plain]
         self.content_type = Mime::TEXT
       else
         self.content_type ||= format.to_s
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index f14ca1ea44..2c6bcf7b7b 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -63,8 +63,6 @@ module ActionDispatch # :nodoc:
     # content you're giving them, so we need to send that along.
     attr_accessor :charset
 
-    attr_accessor :no_content_type # :nodoc:
-
     CONTENT_TYPE = "Content-Type".freeze
     SET_COOKIE   = "Set-Cookie".freeze
     LOCATION     = "Location".freeze
@@ -305,17 +303,8 @@ module ActionDispatch # :nodoc:
       !@sending_file && @charset != false
     end
 
-    def remove_content_type!
-      headers.delete CONTENT_TYPE
-    end
-
     def rack_response(status, header)
-      if no_content_type
-        remove_content_type!
-      else
-        assign_default_content_type_and_charset!(header)
-      end
-
+      assign_default_content_type_and_charset!(header)
       handle_conditional_get!
 
       header[SET_COOKIE] = header[SET_COOKIE].join("\n") if header[SET_COOKIE].respond_to?(:join)