Remove deprecated access to mime types through constants

actionpack/CHANGELOG.md

+*   Remove deprecated access to mime types through constants.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated support to non-keyword arguments in `ActionController::TestCase#process`,
     `#get`, `#post`, `#patch`, `#put`, `#delete`, and `#head`.
 

actionpack/lib/action_dispatch/http/mime_type.rb

@@ -45,32 +45,6 @@ def fetch(type)
       return type if type.is_a?(Type)
       EXTENSION_LOOKUP.fetch(type.to_s) { |k| yield k }
     end
-
-    def const_missing(sym)
-      ext = sym.downcase
-      if Mime[ext]
-        ActiveSupport::Deprecation.warn(<<-MSG.squish)
-          Accessing mime types via constants is deprecated.
-          Please change `Mime::#{sym}` to `Mime[:#{ext}]`.
-        MSG
-        Mime[ext]
-      else
-        super
-      end
-    end
-
-    def const_defined?(sym, inherit = true)
-      ext = sym.downcase
-      if Mime[ext]
-        ActiveSupport::Deprecation.warn(<<-MSG.squish)
-          Accessing mime types via constants is deprecated.
-          Please change `Mime.const_defined?(#{sym})` to `Mime[:#{ext}]`.
-        MSG
-        true
-      else
-        super
-      end
-    end
   end
 
   # Encapsulates the notion of a mime type. Can be used at render time, for example, with:

actionpack/test/dispatch/mime_type_test.rb

@@ -167,18 +167,6 @@ class MimeTypeTest < ActiveSupport::TestCase
     end
   end
 
-  test "deprecated lookup" do
-    assert_deprecated do
-      Mime::HTML
-    end
-  end
-
-  test "deprecated const_defined?" do
-    assert_deprecated do
-      Mime.const_defined? :HTML
-    end
-  end
-
   test "references gives preference to symbols before strings" do
     assert_equal :html, Mime[:html].ref
     another = Mime::Type.lookup("foo/bar")