Remove unused variable name

Aaron1011 · Aaron1011 · commit 23328fecf7a3 · 2020-03-09T13:28:36.000-04:00
diff --git a/tests/smoke.rs b/tests/smoke.rs
@@ -264,7 +264,7 @@ fn simple_test() {
         executable_name
     ));
     {
-        let file = fs::OpenOptions::new()
+        let _ = fs::OpenOptions::new()
             .read(false)
             .write(true)
             .truncate(true)
