Fix some minor compiler and clippy warnings

contracts/mixnet/src/rewards/queries.rs

@@ -66,6 +66,7 @@ pub(crate) mod tests {
     #[cfg(test)]
     mod querying_for_rewarding_status {
         use super::*;
+        use crate::constants;
         use crate::delegations::transactions::try_delegate_to_mixnode;
         use crate::interval::storage::{save_epoch, save_epoch_reward_params};
         use crate::rewards::transactions::try_reward_mixnode;

contracts/mixnet/src/rewards/transactions.rs

@@ -439,7 +439,6 @@ pub mod tests {
     use crate::mixnodes::storage::StoredMixnodeBond;
     use crate::rewards::transactions::try_reward_mixnode;
     use crate::support::tests;
-    use crate::support::tests::fixtures::epoch_fixture;
     use crate::support::tests::test_helpers;
     use az::CheckedCast;
     use config::defaults::DENOM;

nym-wallet/src-tauri/src/operations/vesting/queries.rs

@@ -19,7 +19,7 @@ pub async fn locked_coins(
   Ok(
     nymd_client!(state)
       .locked_coins(
-        &nymd_client!(state).address().to_string(),
+        nymd_client!(state).address().as_ref(),
         block_time.map(Timestamp::from_seconds),
       )
       .await?
@@ -35,7 +35,7 @@ pub async fn spendable_coins(
   Ok(
     nymd_client!(state)
       .spendable_coins(
-        &nymd_client!(state).address().to_string(),
+        nymd_client!(state).address().as_ref(),
         block_time.map(Timestamp::from_seconds),
       )
       .await?

validator-api/src/contract_cache/mod.rs

@@ -23,8 +23,6 @@ use validator_client::nymd::CosmWasmClient;
 
 pub(crate) mod routes;
 
-type Epoch = Interval;
-
 pub struct ValidatorCacheRefresher<C> {
     nymd_client: Client<C>,
     cache: ValidatorCache,