Use `delegate private: true` for `SchemaCreation`

Duplicated method name list is no longer needed.

activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb

@@ -15,9 +15,8 @@ def accept(o)
         end
 
         delegate :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql,
-          :options_include_default?, :supports_indexes_in_create?, :supports_foreign_keys_in_create?, :foreign_key_options, to: :@conn
-        private :quote_column_name, :quote_table_name, :quote_default_expression, :type_to_sql,
-          :options_include_default?, :supports_indexes_in_create?, :supports_foreign_keys_in_create?, :foreign_key_options
+          :options_include_default?, :supports_indexes_in_create?, :supports_foreign_keys_in_create?, :foreign_key_options,
+          to: :@conn, private: true
 
         private
 

activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb

@@ -4,8 +4,7 @@ module ActiveRecord
   module ConnectionAdapters
     module MySQL
       class SchemaCreation < AbstractAdapter::SchemaCreation # :nodoc:
-        delegate :add_sql_comment!, :mariadb?, to: :@conn
-        private :add_sql_comment!, :mariadb?
+        delegate :add_sql_comment!, :mariadb?, to: :@conn, private: true
 
         private