Clean up use statements in `arbitrary` modules (#1984)

* Clean up use statements in `arbitrary` modules

Co-authored-by: Deirdre Connolly <durumcrustulum@gmail.com>

zebra-chain/src/block/arbitrary.rs

@@ -1,17 +1,19 @@
-use std::sync::Arc;
-
-use crate::parameters::Network;
-use crate::work::{difficulty::CompactDifficulty, equihash};
-
-use super::*;
-
-use crate::LedgerState;
-use chrono::{TimeZone, Utc};
 use proptest::{
     arbitrary::{any, Arbitrary},
     prelude::*,
 };
 
+use chrono::{TimeZone, Utc};
+use std::sync::Arc;
+
+use crate::{
+    parameters::Network,
+    work::{difficulty::CompactDifficulty, equihash},
+    LedgerState,
+};
+
+use super::*;
+
 impl Arbitrary for Block {
     type Parameters = LedgerState;
 

zebra-chain/src/transaction/arbitrary.rs

@@ -1,6 +1,5 @@
 use std::sync::Arc;
 
-use block::Height;
 use chrono::{TimeZone, Utc};
 use futures::future::Either;
 use proptest::{arbitrary::any, array, collection::vec, option, prelude::*};
@@ -247,7 +246,7 @@ impl Arbitrary for Transaction {
             ..
         } = ledger_state;
 
-        let height = Height(tip_height.0 + 1);
+        let height = block::Height(tip_height.0 + 1);
         let network_upgrade = NetworkUpgrade::current(network, height);
 
         match network_upgrade {