Remove outdated comment

Author: newpavlov

src/windows.rs

@@ -6,8 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Implementation for Windows UWP targets. After deprecation of Windows XP
-//! and Vista, this can supersede the `RtlGenRandom`-based implementation.
 use crate::Error;
 use core::{ffi::c_void, num::NonZeroU32, ptr};