feat: Optimize some codes (ksud) (#465)

* chore: make cargo clippy happy

Signed-off-by: Tools-app <localhost.hutao@gmail.com>

* chore: Optimize import
-  Format as a standard import

Signed-off-by: Tools-app <localhost.hutao@gmail.com>

---------

Signed-off-by: Tools-app <localhost.hutao@gmail.com>

userspace/ksud/build.rs

@@ -1,8 +1,4 @@
-use std::env;
-use std::fs::File;
-use std::io::Write;
-use std::path::Path;
-use std::process::Command;
+use std::{env, fs::File, io::Write, path::Path, process::Command};
 
 fn get_git_version() -> Result<(u32, String), std::io::Error> {
     let output = Command::new("git")
@@ -14,7 +10,7 @@ fn get_git_version() -> Result<(u32, String), std::io::Error> {
     let version_code: u32 = version_code
         .trim()
         .parse()
-        .map_err(|_| std::io::Error::new(std::io::ErrorKind::Other, "Failed to parse git count"))?;
+        .map_err(|_| std::io::Error::other("Failed to parse git count"))?;
     let version_code = 10000 + 700 + version_code; // For historical reasons
 
     let version_name = String::from_utf8(
@@ -23,7 +19,7 @@ fn get_git_version() -> Result<(u32, String), std::io::Error> {
             .output()?
             .stdout,
     )
-    .map_err(|_| std::io::Error::other("Failed to read git describe stdout"))?;
+    .map_err(|_| std::io::Error::other("Failed to parse git count"))?;
     let version_name = version_name.trim_start_matches('v').to_string();
     Ok((version_code, version_name))
 }