Deny deny-unsafe_op_in_unsafe_fn on the crate level

src/header/sys_select/mod.rs

@@ -2,9 +2,6 @@
 //!
 //! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_select.h.html>.
 
-// TODO: set this for entire crate when possible
-#![deny(unsafe_op_in_unsafe_fn)]
-
 use core::mem;
 
 use cbitset::BitSet;