Fix some cargo clippy hints

build.rs

@@ -7,23 +7,17 @@ fn main() {
     println!("cargo:rerun-if-env-changed=ONNXRUNTIME_LIB_DIR");
     println!("cargo:rerun-if-env-changed=ONNXRUNTIME_INCLUDE_DIR");
 
-    match std::env::var("ONNXRUNTIME_LIB_DIR") {
-        Ok(dirs) => {
-            for dir in dirs.split(":") {
-                println!("cargo:rustc-link-search={}", dir);
-            }
+    if let Ok(dirs) = std::env::var("ONNXRUNTIME_LIB_DIR") {
+        for dir in dirs.split(':') {
+            println!("cargo:rustc-link-search={}", dir);
         }
-        Err(_) => (),
     };
 
     let mut clang_args = Vec::new();
-    match std::env::var("ONNXRUNTIME_INCLUDE_DIR") {
-        Ok(dirs) => {
-            for dir in dirs.split(":") {
-                clang_args.push(format!("-I{}", dir));
-            }
+    if let Ok(dirs) = std::env::var("ONNXRUNTIME_INCLUDE_DIR") {
+        for dir in dirs.split(':') {
+            clang_args.push(format!("-I{}", dir));
         }
-        Err(_) => (),
     };
 
     println!("cargo:rustc-link-lib=onnxruntime");

src/lib.rs

@@ -334,7 +334,7 @@ impl Session {
         ArgumentInfo {
             session: &self,
             ix,
-            arg_type: arg_type,
+            arg_type,
             info: RefCell::new(None),
         }
     }