[QuickReview][Codemod][Lint:fbsource:RUSTFIX:clippy::unnecessary_sort_by] Fix clippy::unnecessary_sort_by issues in fbcode/antlir/antlir2/antlir2_packager/make_oci_layer/src

Reviewed By: dtolnay

Differential Revision: D95187355

fbshipit-source-id: 9094b375ba7320909d36b186dabe000ea7765556

Author: generatedunixname1458480625696264

antlir/antlir2/antlir2_packager/make_oci_layer/src/main.rs

@@ -384,7 +384,7 @@ fn main() -> Result<()> {
     // Write parent directories to tar with their metadata from the child layer
     // Sort parents so shallower paths (fewer components) come first - this ensures
     // we write parents before children in the tar, which helps with metadata preservation
-    parents_to_add.sort_by(|a, b| a.components().count().cmp(&b.components().count()));
+    parents_to_add.sort_by_key(|a| a.components().count());
 
     for parent_path in parents_to_add {
         // Strip leading slash before joining to child layer path