Delete comment about variable that doesn't exist

data/campaigns/Under_the_Burning_Suns/scenarios/03_Stirring_in_the_Night.cfg

@@ -689,7 +689,7 @@
     # Inform the player about the possibility of challenge and
     # adjust Garak accordingly. Perform the challenge, set the
     # death events where required. Internal variables :
-    # $garak_duel, $garak_x, $garak_y, $challenged
+    # $garak_x, $garak_y, $challenged
     [event]
         name=turn 2
         [message]