Remove frustration mob sound

mods/ENTITIES/mcl_mobs/api.lua

@@ -1298,9 +1298,6 @@ local smart_mobs = function(self, s, p, dist, dtime)
 
 			-- will try again in 2 second
 			self.path.stuck_timer = stuck_timeout - 2
-
-			-- frustration! cant find the damn path :(
-			mob_sound(self, self.sounds.random, true)
 		else
 			-- yay i found path
 			mob_sound(self, self.sounds.war_cry, true)

mods/ENTITIES/mcl_mobs/api.txt

@@ -132,7 +132,6 @@ functions needed for the mob to work properly which contains the following:
    'sounds'               this is a table with sounds of the mob
       'distance'          maximum distance sounds can be heard, default is 10.
       'random'            played randomly from time to time.
-                          also played when mob is frustrated for not finding the path.
                           also played for overfeeding animal.
       'war_cry'           what you hear when mob starts to attack player.
       'attack'            what you hear when being attacked.