Remove work-around for unsafe in puffin macro (#4484)

…since it is no longer in the puffin macro

crates/egui_extras/src/lib.rs

@@ -8,8 +8,6 @@
 
 #![allow(clippy::float_cmp)]
 #![allow(clippy::manual_range_contains)]
-#![cfg_attr(feature = "puffin", deny(unsafe_code))]
-#![cfg_attr(not(feature = "puffin"), forbid(unsafe_code))]
 
 #[cfg(feature = "chrono")]
 mod datepicker;