From ed8cb40245ad5f50aecb517bec7cd3dfd3946a8b Mon Sep 17 00:00:00 2001
From: Ryan Leckey <ryan@launchbadge.com>
Date: Thu, 2 Jan 2020 23:49:42 -0800
Subject: [PATCH] Remove more unused imports

---
 sqlx-core/src/mysql/connection.rs | 4 +---
 sqlx-core/src/mysql/executor.rs   | 5 ++---
 sqlx-core/src/mysql/rsa.rs        | 6 +++---
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/sqlx-core/src/mysql/connection.rs b/sqlx-core/src/mysql/connection.rs
index 4b51dc980..4005e35ca 100644
--- a/sqlx-core/src/mysql/connection.rs
+++ b/sqlx-core/src/mysql/connection.rs
@@ -5,11 +5,9 @@ use async_std::net::{Shutdown, TcpStream};
 use byteorder::{ByteOrder, LittleEndian};
 use futures_core::future::BoxFuture;
 use sha1::Sha1;
-use sha2::{Digest, Sha256};
 
 use crate::cache::StatementCache;
 use crate::connection::Connection;
-use crate::executor::Executor;
 use crate::io::{Buf, BufMut, BufStream};
 use crate::mysql::error::MySqlError;
 use crate::mysql::protocol::{
@@ -306,7 +304,7 @@ impl MySqlConnection {
         self.send(&[public_key_request_id][..]).await?;
 
         // server sends a public key response
-        let mut packet = self.receive().await?.packet();
+        let packet = self.receive().await?.packet();
         let rsa_pub_key = &packet[1..];
 
         // The password string data must be NUL terminated
diff --git a/sqlx-core/src/mysql/executor.rs b/sqlx-core/src/mysql/executor.rs
index cb681451f..f35c11080 100644
--- a/sqlx-core/src/mysql/executor.rs
+++ b/sqlx-core/src/mysql/executor.rs
@@ -6,10 +6,9 @@ use futures_core::stream::BoxStream;
 
 use crate::describe::{Column, Describe};
 use crate::executor::Executor;
-use crate::mysql::error::MySqlError;
 use crate::mysql::protocol::{
     Capabilities, ColumnCount, ColumnDefinition, ComQuery, ComStmtExecute, ComStmtPrepare,
-    ComStmtPrepareOk, Cursor, Decode, EofPacket, ErrPacket, OkPacket, Row, Type,
+    ComStmtPrepareOk, Cursor, Decode, EofPacket, OkPacket, Row, Type,
 };
 use crate::mysql::{MySql, MySqlArguments, MySqlConnection, MySqlRow};
 
@@ -148,7 +147,7 @@ impl MySqlConnection {
 
     async fn step(&mut self, columns: &[Type], binary: bool) -> crate::Result<Option<Step>> {
         let capabilities = self.capabilities;
-        let packet = ret_if_none!(self.try_receive().await?);
+        ret_if_none!(self.try_receive().await?);
 
         match self.packet[0] {
             0xfe if self.packet.len() < 0xffffff => {
diff --git a/sqlx-core/src/mysql/rsa.rs b/sqlx-core/src/mysql/rsa.rs
index 4cd4528be..6be0bb2aa 100644
--- a/sqlx-core/src/mysql/rsa.rs
+++ b/sqlx-core/src/mysql/rsa.rs
@@ -1,4 +1,4 @@
-use digest::{Digest, DynDigest};
+use digest::Digest;
 use num_bigint::BigUint;
 use rand::{thread_rng, Rng};
 
@@ -125,8 +125,8 @@ fn oaep_encrypt<R: Rng, D: Digest>(
     oeap_mgf1_xor(seed, &mut digest, db);
 
     {
-        let mut m = BigUint::from_bytes_be(&em);
-        let mut c = internals_encrypt(pub_key, &m).to_bytes_be();
+        let m = BigUint::from_bytes_be(&em);
+        let c = internals_encrypt(pub_key, &m).to_bytes_be();
 
         internals_copy_with_left_pad(&mut em, &c);
     }