Removes dry-green grass nodes and ABM

Let harsh biome borders rule supreme. Just wasn't a fan of this ABM.

mods/australia_modpack/australia/functions.lua

@@ -51,54 +51,3 @@ end
 function displaytime(time)
 	return math.floor(time * 1000000 + 0.5) / 1000 .. " ms"
 end
-
-
---[[
-	Convert dirt with dry grass to dirt with dry graan grass when next to dirt with grass.
---]]
-
-minetest.register_abm({
-	nodenames = {"default:dirt_with_grass"},
-	neighbors = {
-		"default:dirt_with_dry_grass",
-	},
-	interval = 6,
-	chance = 67,
-	catch_up = false,
-	action = function(pos, node)
-		-- Most likely case, half the time it's too dark for this.
-		local above = {x = pos.x, y = pos.y + 1, z = pos.z}
-		if (minetest.get_node_light(above) or 0) < 13 then
-			return
-		end
-
-		-- Look for likely neighbors.
-		local p2 = minetest.find_node_near(pos, 1, {"default:dirt_with_dry_grass"})
-		if p2 then
-			-- But the node needs to be under air in this case.
-			local n2 = minetest.get_node(above)
-			if n2 and n2.name == "air" then
-				minetest.set_node(pos, {name = "australia:dirt_with_dry_green_grass"})
-				return
-			end
-		end
-
-		-- Anything on top?
-		local n2 = minetest.get_node(above)
-		if not n2 then
-			return
-		end
-
-		local name = n2.name
-		-- Snow check is cheapest, so comes first.
-		if name == "default:snow" then
-			minetest.set_node(pos, {name = "default:dirt_with_snow"})
-		-- Most likely case first.
-		elseif minetest.get_item_group(name, "grass") ~= 0 then
-			minetest.set_node(pos, {name = "default:dirt_with_grass"})
-		elseif minetest.get_item_group(name, "dry_grass") ~= 0 then
-			minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
-		end
-
-	end
-})

mods/australia_modpack/australia/nodes_other.lua

@@ -1,18 +1,5 @@
 -- mods/australia_modpack/australia/nodes_other.lua
 
-minetest.register_node("australia:dirt_with_dry_green_grass", {
-	description = "Dirt with Dry-Green Grass",
-	tiles = {"aus_dry_green_grass.png",
-		"default_dirt.png",
-		{name = "default_dirt.png^aus_dry_green_grass_side.png",
-			tileable_vertical = false}},
-	groups = {crumbly = 3, soil = 1},
-	drop = "default:dirt",
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name = "default_grass_footstep", gain = 0.33},
-	}),
-})
-
 minetest.register_node("australia:red_stone", {
 	description = "Red Stone",
 	tiles = {"aus_red_stone.png"},