Remove mention of task stack size configuration
//! ## Configuring tasks
//!
//! A new task can be configured before it is spawned via the [`Builder`] type,
-//! which currently allows you to set the name and stack size for the child task:
+//! which currently allows you to set the name for the child task:
//!
//! ```
//! # #![allow(unused_must_use)]
//! [`join`]: struct.JoinHandle.html#method.join
//! [`panic!`]: https://doc.rust-lang.org/std/macro.panic.html
//! [`Builder`]: struct.Builder.html
-//! [`Builder::stack_size`]: struct.Builder.html#method.stack_size
//! [`Builder::name`]: struct.Builder.html#method.name
//! [`task::current`]: fn.current.html
//! [`Task`]: struct.Task.html
