fullscreen_credits: Remove `attributeOldValue` on mutation observer

Don't need the old attribute value. I had added this originally to be
able to print the values to the console for development. Now it's no
longer needed.

1 files changed, 1 insertions, 2 deletions

diff --git a/netflix-immersive.user.js b/netflix-immersive.user.js
index 7800d96..5fdc7bd 100644
--- a/netflix-immersive.user.js
+++ b/netflix-immersive.user.js
@@ -98,8 +98,7 @@ function init_mutation_observer(player) {
         }
     });
     observer.observe(player, {
-        attributeFilter: ['class'],
-        attributeOldValue: true
+        attributeFilter: ['class']
     });
 }
 // Initialise the mutation observer when the video player becomes available.