Remove `linked_list_extras` methods. Removing these in favor of the `Cursor` API in https://github.com/rust-lang/rust/issues/58533 . Closes #27794. r? @Amanieu
Remove `linked_list_extras` methods. Removing these in favor of the `Cursor` API in https://github.com/rust-lang/rust/issues/58533 . Closes #27794. r? @Amanieu