diff --git a/coverage/fuel3.html b/coverage/fuel3.html
index aa8642e..dd40482 100644
--- a/coverage/fuel3.html
+++ b/coverage/fuel3.html
@@ -99,10 +99,6 @@
         title: "OpenStreetMap gray",
         visible: true
     });
-    
-    ort.on('postcompose', function(event) {
-        greyscale(event.context);
-    });
 
     const fuel0 = new ol.layer.VectorTile({
         source: new ol.source.VectorTile({