fix warnings

src/api/boot.rs

@@ -9,7 +9,6 @@ use pbkdf2::{
 use tokio::net::TcpStream;
 use tokio::io::AsyncWriteExt;
 use tokio::io::AsyncReadExt;
-use std::error::Error;
 
 static COMMANDS: [(&str, u8); 3] = [("start", 0x1) , ("stop", 0x2), ("reboot", 0x3)];
 
@@ -45,8 +44,6 @@ async fn pc_boot(command: String, pass: String) -> Result<String, HttpError>  {
         1 => { return Ok("Failed".to_string()) },
         _ => { return Ok("Invalid response".to_string()) }
     }
-
-    Ok("Hello".to_string())
 }
 
 #[get("/api/pc/status")]
@@ -60,8 +57,8 @@ async fn pc_status() -> Result<i32, HttpError> {
 }
 
 async fn esp_boot_request(command: u8) -> Result<i32, tokio::io::Error> {
-    let mut stream = None;
     let mut retry = 3;
+    let mut stream;
 
     println!("send request to esp");
     loop {