Fix image feature metadata

README.md

@@ -12,11 +12,7 @@ dataset_info:
     - name: role
       dtype: string
   - name: images
-    list:
-    - name: bytes
-      dtype: binary
-    - name: path
-      dtype: 'null'
+    list: image
   splits:
   - name: train
     num_bytes: 1568727068