message: Remove unused imports in `stop_at` module
diff: @@ -67,11 +67,7 @@ mod tests {
  use super::StopAtSpec;
  use casper_types::EraId;
  - use proptest::{
  - prelude::any,
  - prop_oneof, proptest,
  - strategy::{Just, Strategy},
  - };
  + use proptest::proptest;
  proptest! {
  #[test]
  