Remove barrels from Cavalry mode

[Ramos_Caoliki]

Its quite simple to see : Archers need faster , lighter horses and not have such low accuracy on their horses same can be said for crossbowmen , perhaps slightly more armored and slower but still fairly quick. Barrels and Tomes are a necessity and shouldn't be touched as it will cause a severe unbalance in game play making it extremely difficult to beat higher waves.