[alacritty] Clean up old config

alacritty/.config/alacritty/alacritty.yml

@@ -74,8 +74,6 @@ bell:
   animation: EaseOutExpo
   duration: 1
 
-background_opacity: 1.0
-
 mouse_bindings:
   - { mouse: Middle, action: PasteSelection }
 
@@ -83,7 +81,7 @@ mouse:
   double_click: { threshold: 300 }
   triple_click: { threshold: 300 }
   hide_when_typing: false
-  url:
+  hints:
     launcher: open
 
 selection: