Fix clippy lint that only appears on Windows

Author: chriskrycho

tests/acceptance/volta_bypass.rs

@@ -25,7 +25,7 @@ fn shim_skips_platform_checks_on_bypass() {
 
     #[cfg(windows)]
     assert_that!(
-        s.process(&shim_exe()),
+        s.process(shim_exe()),
         execs()
             .with_status(ExitCode::UnknownError as i32)
             .with_stderr_contains("[..]is not recognized as an internal or external command[..]")