mux: drop orphan comment that tripped comment-guard

src/mux/resolve.rs

@@ -534,8 +534,6 @@ where
     }
     let title = disc.titles[idx].clone();
     let format = disc.content_format;
-    // ISO file: use the same tuned batch as the other file-backed mux path.
-
     // Pass `DecryptKeys::None` to the decrypt decorator when --raw is set —
     // the read stack still flows through the same producer+demux+parse
     // pipeline, just without the AACS/CSS step. One highway for ISO reads.