cleaned up picom config

picom/.config/picom.conf

@@ -15,8 +15,6 @@ fade-delta    = 8;
 transparent-clipping = false;
 opacity-rule = [
   "90:class_g = 'Alacritty'",
-  "90:class_g = 'Kitty'",
-  "90:class_g = 'Zutty'",
   "90:class_g = 'com.mitchellh.ghostty'",
   "85:class_g = 'Polybar'",
   "95:class_g = 'SpeedCrunch'",
@@ -29,7 +27,7 @@ rounded-corners-exclude = [
 ];
 
 # general
-backend = "xrender";
+backend = "glx";
 vsync = true;
 use-damage = true;
 xrender-sync = true;