util: remove take_one, does not seem to be used

Author: Ivo Georgiev

primitives/src/util.rs

@@ -1,15 +1,6 @@
 pub mod tests {
-    use rand::seq::SliceRandom;
-    use rand::thread_rng;
-
     pub mod prep_db;
     pub mod time;
-
-    #[inline]
-    pub fn take_one<'a, T: ?Sized>(list: &[&'a T]) -> &'a T {
-        let mut rng = thread_rng();
-        list.choose(&mut rng).expect("take_one got empty list")
-    }
 }
 
 pub mod serde {