Update dependencies and fix some warnings

src/api/core/two_factor.rs

@@ -787,7 +787,6 @@ fn _duo_api_request(method: &str, path: &str, params: &str) -> EmptyResult {
 
     use std::str::FromStr;
 
-    use chrono::Utc;
     use reqwest::{header::*, Client, Method};
 
     let ik = CONFIG.duo_ikey().unwrap();

src/crypto.rs

@@ -2,7 +2,7 @@
 // PBKDF2 derivation
 //
 
-use ring::{digest, pbkdf2};
+use ring::{digest, pbkdf2, hmac};
 
 static DIGEST_ALG: &digest::Algorithm = &digest::SHA256;
 const OUTPUT_LEN: usize = digest::SHA256_OUTPUT_LEN;
@@ -24,7 +24,6 @@ pub fn verify_password_hash(secret: &[u8], salt: &[u8], previous: &[u8], iterati
 //
 pub fn hmac_sign(key: &str, data:&str) -> String {
     use data_encoding::HEXLOWER;
-    use ring::{digest, hmac};
 
     let key = hmac::SigningKey::new(&digest::SHA1, key.as_bytes());
     let signature = hmac::sign(&key, data.as_bytes());

src/db/models/cipher.rs

@@ -72,9 +72,7 @@ use crate::error::MapResult;
 /// Database methods
 impl Cipher {
     pub fn to_json(&self, host: &str, user_uuid: &str, conn: &DbConn) -> Value {
-        use super::Attachment;
         use crate::util::format_date;
-        use serde_json;
 
         let attachments = Attachment::find_by_cipher(&self.uuid, conn);
         let attachments_json: Vec<Value> = attachments.iter().map(|c| c.to_json(host)).collect();

src/db/models/user.rs

@@ -113,8 +113,6 @@ use crate::error::MapResult;
 /// Database methods
 impl User {
     pub fn to_json(&self, conn: &DbConn) -> Value {
-        use super::{TwoFactor, UserOrganization};
-
         let orgs = UserOrganization::find_by_user(&self.uuid, conn);
         let orgs_json: Vec<Value> = orgs.iter().map(|c| c.to_json(&conn)).collect();
         let twofactor_enabled = !TwoFactor::find_by_user(&self.uuid, conn).is_empty();