[mod] remove the kickass engine from settings.yml

searx/settings.yml

@@ -324,10 +324,6 @@ engines:
     timeout : 10.0
     disabled : True
 
-  - name : kickass
-    engine : kickass
-    shortcut : ka
-
   - name : scanr_structures
     shortcut: scs
     engine : scanr_structures