Fix a couple small clippy warnings

- suppress warning about unused function on windows
- remove extraneous & in test

tests/testenv/mod.rs

@@ -186,6 +186,7 @@ impl TestEnv {
     }
 
     /// Get the path of the fd executable.
+    #[cfg_attr(windows, allow(unused))]
     pub fn test_exe(&self) -> &PathBuf {
         &self.fd_exe
     }

tests/tests.rs

@@ -2208,7 +2208,7 @@ fn test_invalid_cwd() {
     std::env::set_current_dir(&root).unwrap();
     fs::remove_dir(&root).unwrap();
 
-    let output = std::process::Command::new(&te.test_exe())
+    let output = std::process::Command::new(te.test_exe())
         .arg("query")
         .arg(te.test_root())
         .output()