docs: remove duplicate contact sheet from README

README.md

@@ -110,11 +110,6 @@ The following links are relative archive paths. A failed cell is rendered as an
 explicit “NO SAMPLE” panel; it is not replaced with a black image or an inferred
 metric.
 
-![Representative cross-codec comparison tables](images/visual_tables_contact_sheet.png)
-
-*Caption: representative prompt panels across PNG, WebP lossless, raw lossy,
-finite repair, and protected high-byte reconstructions.*
-
 ![Representative JPEG Q100 comparison table](images/visual_table_jpeg_q100.png)
 
 *Caption: JPEG Q100 table showing raw, finite-repair, and protected cells for representative prompts.*