Merge pull request #19627 from koenpunt/patch-1

remove duplicates

activerecord/lib/active_record/model_schema.rb

@@ -328,12 +328,8 @@ def reload_schema_from_cache
         @default_attributes = nil
         @inheritance_column = nil unless defined?(@explicit_inheritance_column) && @explicit_inheritance_column
         @attributes_builder = nil
-        @column_names = nil
-        @attribute_types = nil
         @columns = nil
         @columns_hash = nil
-        @content_columns = nil
-        @default_attributes = nil
         @attribute_names = nil
       end