Remove deprecated support to :nothing in render

actionpack/CHANGELOG.md

+*   Remove deprecated support to `:nothing` in `render`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated support to `:back` in `redirect_to`.
 
     *Rafael Mendonça França*

actionpack/lib/action_controller/metal/rendering.rb

@@ -98,11 +98,6 @@ def _normalize_options(options) #:nodoc:
           options[:html] = ERB::Util.html_escape(options[:html])
         end
 
-        if options.delete(:nothing)
-          ActiveSupport::Deprecation.warn("`:nothing` option is deprecated and will be removed in Rails 5.1. Use `head` method to respond with empty response body.")
-          options[:body] = nil
-        end
-
         if options[:status]
           options[:status] = Rack::Utils.status_code(options[:status])
         end

actionpack/test/controller/render_test.rb

@@ -160,10 +160,6 @@ def conditional_hello_with_cache_control_headers
     render action: "hello_world"
   end
 
-  def respond_with_empty_body
-    render nothing: true
-  end
-
   def conditional_hello_with_bangs
     render action: "hello_world"
   end
@@ -371,12 +367,6 @@ def test_expires_now_with_cache_control_headers
     assert_match(/no-transform/, @response.headers["Cache-Control"])
   end
 
-  def test_render_nothing_deprecated
-    assert_deprecated do
-      get :respond_with_empty_body
-    end
-  end
-
   def test_date_header_when_expires_in
     time = Time.mktime(2011,10,30)
     Time.stub :now, time do