Beta compiler fixes (#5543)

* remove duplicate imports in gossip tests. get rid of duplicate trait bound locations

* more double import fixes

* cargo fmt

consensus/types/src/chain_spec.rs

@@ -1651,7 +1651,6 @@ where
 mod tests {
     use super::*;
     use itertools::Itertools;
-    use safe_arith::SafeArith;
 
     #[test]
     fn test_mainnet_spec_can_be_constructed() {