Clean-up tree fruits

mods/hades_fertilizer/init.lua

@@ -28,6 +28,12 @@ do
 	local t = { 0, true, "refruit:bud_banana", "refruit:flower_banana", "hades_trees:banana" }
 	table.insert(plants_rotate, t)
 
+	local t = { 0, true, "refruit:bud_cocoa", "refruit:flower_cocoa", "hades_trees:cocoa_pod" }
+	table.insert(plants_rotate, t)
+
+	local t = { 0, true, "refruit:bud_coconut", "refruit:flower_coconut", "hades_trees:coconut" }
+	table.insert(plants_rotate, t)
+
 	t = { 0, false }
 	for i=1,5 do
 		table.insert(t, "hades_core:grass_"..i)

mods/hades_trees/api.lua

@@ -93,8 +93,10 @@ hades_trees.register_fruit = function(id, def)
 	end
 	local groups = {dig_immediate=3,flammable=2,leafdecay=3,leafdecay_drop=1,food=food,eatable=sat}
 	if def.groups then
-		groups.dig_immediate = nil
 		for k,v in pairs(def.groups) do
+			if v == 0 then
+				v = nil
+			end
 			groups[k] = v
 		end
 	end

mods/hades_trees/coconut.lua

@@ -10,7 +10,6 @@ hades_trees.register_fruit("coconut", {
 	drawtype = "plantlike",
 	image = "hades_trees_coconut.png",
 	selbox = {-5/16, -7/16, -5/16, 5/16, 7/16, 5/16},
-	groups = {choppy=3},
 })
 
 minetest.register_abm({