std: use /dev/urandom on Redox

Author: joboet

library/std/src/sys/pal/unix/rand.rs

@@ -48,11 +48,7 @@ cfg_if::cfg_if! {
                 return res;
             }
 
-            const PATH: &'static str = if cfg!(target_os = "redox") {
-                "rand:"
-            } else {
-                "/dev/urandom"
-            };
+            const PATH: &'static str = "/dev/urandom";
 
             static FILE: OnceLock<File> = OnceLock::new();