Remove domestic attribute from wolves on polar sea.
This made entites use slaughter against the wolves instead of normal attacks.
After r24148 / rP24148 the class is not needed anymore to be able to move the wolves.
The fix of the wolves stacking in one place is deferred.
Patch by: @Dunedan
Differential Revision: D2771
Reviewed by: @wraitii
Comments by: @elexis