refactoring: remove unneeded metadata call

src/builtins/ls.rs

@@ -29,6 +29,7 @@ impl Builtin for Ls {
                     continue;
                 }
             };
+
             let file_name = entry.file_name().to_string_lossy().to_string();
             let mut file_type = "unknown";
             if metadata.file_type().is_dir() {