Organize imports (#188)

* Organize imports

Use rustfmt to organize imports.  Resolve #162

* remove unused imports

* cargo fmt

src/backends/plonky2/mock/mainpod/mod.rs

@@ -1,12 +1,10 @@
+use std::{any::Any, fmt};
+
 use anyhow::{anyhow, Result};
 use base64::prelude::*;
 use itertools::Itertools;
-use log::error;
-use plonky2::hash::poseidon::PoseidonHash;
-use plonky2::plonk::config::Hasher;
+use plonky2::{hash::poseidon::PoseidonHash, plonk::config::Hasher};
 use serde::{Deserialize, Serialize};
-use std::any::Any;
-use std::fmt;
 
 use crate::{
     backends::plonky2::primitives::merkletree,
@@ -608,13 +606,14 @@ impl Pod for MockMainPod {
 #[cfg(test)]
 pub mod tests {
     use super::*;
-    use crate::backends::plonky2::mock::signedpod::MockSigner;
-    use crate::examples::{
-        great_boy_pod_full_flow, tickets_pod_full_flow, zu_kyc_pod_builder,
-        zu_kyc_sign_pod_builders,
+    use crate::{
+        backends::plonky2::mock::signedpod::MockSigner,
+        examples::{
+            great_boy_pod_full_flow, tickets_pod_full_flow, zu_kyc_pod_builder,
+            zu_kyc_sign_pod_builders,
+        },
+        middleware,
     };
-    use crate::middleware;
-    use crate::middleware::containers::Set;
 
     #[test]
     fn test_mock_main_zu_kyc() -> Result<()> {

src/backends/plonky2/mock/mainpod/operation.rs

@@ -1,12 +1,16 @@
-use super::Statement;
+use std::{fmt, iter};
+
+use anyhow::{anyhow, Result};
+use plonky2::field::types::Field;
+use serde::{Deserialize, Serialize};
+
 use crate::{
-    backends::plonky2::primitives::merkletree::{self, kv_hash},
+    backends::plonky2::{
+        mock::mainpod::Statement,
+        primitives::merkletree::{self},
+    },
     middleware::{self, Hash, OperationType, Params, ToFields, Value, EMPTY_HASH, EMPTY_VALUE, F},
 };
-use anyhow::{anyhow, Result};
-use plonky2::field::types::{Field, PrimeField64};
-use serde::{Deserialize, Serialize};
-use std::{fmt, iter};
 
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum OperationArg {

src/backends/plonky2/mock/mainpod/statement.rs

@@ -1,6 +1,7 @@
+use std::fmt;
+
 use anyhow::{anyhow, Result};
 use serde::{Deserialize, Serialize};
-use std::fmt;
 
 use crate::middleware::{
     self, AnchoredKey, NativePredicate, Params, Predicate, StatementArg, ToFields,

src/backends/plonky2/mock/signedpod.rs

@@ -1,13 +1,15 @@
+use std::{any::Any, collections::HashMap};
+
 use anyhow::{anyhow, Result};
 use itertools::Itertools;
-use std::any::Any;
-use std::collections::HashMap;
 
-use crate::backends::plonky2::primitives::merkletree::MerkleTree;
-use crate::constants::MAX_DEPTH;
-use crate::middleware::{
-    containers::Dictionary, hash_str, AnchoredKey, Hash, Params, Pod, PodId, PodSigner, PodType,
-    Statement, Value, KEY_SIGNER, KEY_TYPE,
+use crate::{
+    backends::plonky2::primitives::merkletree::MerkleTree,
+    constants::MAX_DEPTH,
+    middleware::{
+        containers::Dictionary, hash_str, AnchoredKey, Hash, Params, Pod, PodId, PodSigner,
+        PodType, Statement, Value, KEY_SIGNER, KEY_TYPE,
+    },
 };
 
 pub struct MockSigner {
@@ -129,13 +131,16 @@ impl Pod for MockSignedPod {
 
 #[cfg(test)]
 pub mod tests {
-    use plonky2::field::types::Field;
     use std::iter;
 
+    use plonky2::field::types::Field;
+
     use super::*;
-    use crate::constants::MAX_DEPTH;
-    use crate::frontend;
-    use crate::middleware::{self, EMPTY_HASH, F};
+    use crate::{
+        constants::MAX_DEPTH,
+        frontend,
+        middleware::{self, EMPTY_HASH, F},
+    };
 
     #[test]
     fn test_mock_signed_0() -> Result<()> {