Fix clippy

Signed-off-by: Xuanwo <[email protected]>

src/compiler/args.rs

@@ -671,7 +671,7 @@ macro_rules! take_arg {
         ArgInfo::TakeArg(
             $s,
             |arg: OsString| $vtype::process(arg).map($variant),
-            ArgDisposition::$d(Some($x as u8)),
+            ArgDisposition::$d(Some(b'=')),
         )
     };
 }

src/compiler/c.rs

@@ -1263,7 +1263,7 @@ impl pkg::ToolchainPackager for CToolchainPackager {
         // files by path.
         let named_file = |kind: &str, name: &str| -> Option<PathBuf> {
             let mut output = process::Command::new(&self.executable)
-                .arg(&format!("-print-{}-name={}", kind, name))
+                .arg(format!("-print-{}-name={}", kind, name))
                 .output()
                 .ok()?;
             debug!(

src/compiler/rust.rs

@@ -3560,7 +3560,7 @@ proc_macro false
             "./src/lib.rs",
             "--emit=dep-info,link",
             "--out-dir",
-            "/out",
+            "/out"
         );
 
         assert_eq!(h.gcno, Some("foo.gcno".into()));
@@ -3575,7 +3575,7 @@ proc_macro false
             "-C",
             "extra-filename=-a1b6419f8321841f",
             "--out-dir",
-            "/out",
+            "/out"
         );
 
         assert_eq!(h.gcno, Some("foo-a1b6419f8321841f.gcno".into()));

src/server.rs

@@ -56,7 +56,6 @@ use std::task::{Context, Poll, Waker};
 use std::time::Duration;
 #[cfg(feature = "dist-client")]
 use std::time::Instant;
-use std::u64;
 use tokio::sync::Mutex;
 use tokio::sync::RwLock;
 use tokio::{