Same question as above: do all of your finished goods contain the same tree nut ingredients? If some have only almonds but others have almonds and cashews, you'll need a cleaning validation specific to the nuts. FDA requires labeling of not just generic "tree nuts" but specifically which nuts due to the variation in the population (some suffering from tree nut allergies are only allergic to walnuts, for example). If each of your finished goods contains all of the tree nut allergens you handle, you can probably get away with describing that in your allergen control program to justify not testing for each individual nut. But it needs to be clearly spelled out that if you were to change formulations or introduce a new ingredient, you would ensure cross contamination is prevented within your sanitation practices.
As far as allergen handling entirely, you'll still need to maintain labeling and protocols for raw material handling. Clients of mine in the past have tried to say they don't need to segregate allergens because their entire finished goods lineup contain the allergens, but I haven't found an auditor yet who will let that slide.