Remove deprecated AbstractController::Base::parent_prefixes

Author: rafaelfranca

actionview/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated `AbstractController::Base::parent_prefixes`.
+
+    *Rafael Mendonça França*
+
 *   Default translations that have a lower precedence than a html safe default,
     but are not themselves safe, should not be marked as html_safe.
 

actionview/lib/action_view/view_paths.rb

@@ -16,14 +16,9 @@ module ViewPaths
     module ClassMethods
       def _prefixes # :nodoc:
         @_prefixes ||= begin
-          deprecated_prefixes = handle_deprecated_parent_prefixes
-          if deprecated_prefixes
-            deprecated_prefixes
-          else
-            return local_prefixes if superclass.abstract?
-
-            local_prefixes + superclass._prefixes
-          end
+          return local_prefixes if superclass.abstract?
+
+          local_prefixes + superclass._prefixes
         end
       end
 
@@ -34,17 +29,6 @@ def _prefixes # :nodoc:
       def local_prefixes
         [controller_path]
       end
-
-      def handle_deprecated_parent_prefixes # TODO: remove in 4.3/5.0.
-        return unless respond_to?(:parent_prefixes)
-
-        ActiveSupport::Deprecation.warn(<<-MSG.squish)
-          Overriding `ActionController::Base::parent_prefixes` is deprecated,
-          override `.local_prefixes` instead.
-        MSG
-
-        local_prefixes + parent_prefixes
-      end
     end
 
     # The prefixes used in render "foo" shortcuts.

actionview/test/actionpack/abstract/abstract_controller_test.rb

@@ -182,22 +182,6 @@ class OverridingLocalPrefixesTest < ActiveSupport::TestCase # TODO: remove me in
       end
     end
 
-    class DeprecatedParentPrefixes < OverridingLocalPrefixes
-      def self.parent_prefixes
-        ["abstract_controller/testing/me3"]
-      end
-    end
-
-    class DeprecatedParentPrefixesTest < ActiveSupport::TestCase # TODO: remove me in 5.0/4.3.
-      test "overriding .parent_prefixes is deprecated" do
-        @controller = DeprecatedParentPrefixes.new
-        assert_deprecated do
-          @controller.process(:index)
-        end
-        assert_equal "Hello from me3/index.erb", @controller.response_body
-      end
-    end
-
     # Test rendering with layouts
     # ====
     # self._layout is used when defined