Generator_DZ no longer in BuiltItems

Needed to add it to variables.sqf lists.

@icomrade - Any reason FireBarrel_DZ was removed? I think we still need
it, since it is an epoch buildable class, unless we merge it with
Land_Fire_barrel.

SQF/dayz_code/Configs/CfgVehicles/Helicopter/AH6.hpp

@@ -1,4 +1,3 @@
-class AH6_Base_EP1;
 class AH6J_EP1_DZ: AH6_Base_EP1
 {
 	scope = public;