fixup! WIP refactor is_writable()

Author: jfinkels

src/uu/rm/src/rm.rs

@@ -351,7 +351,7 @@ fn is_writable(path: &Path) -> bool {
 }
 
 #[cfg(not(unix))]
-fn is_writable(path: &Path) -> bool {
+fn is_writable(_path: &Path) -> bool {
     true
 }