[ruby-core:124054] [Ruby Misc#21768] Remove deprecated functions

Issue #21768 has been reported by nobu (Nobuyoshi Nakada). ---------------------------------------- Misc #21768: Remove deprecated functions https://bugs.ruby-lang.org/issues/21768 * Author: nobu (Nobuyoshi Nakada) * Status: Open ---------------------------------------- -- https://bugs.ruby-lang.org/