Remove unused variables and do some whitespace fixes

src/abms.lua

@@ -4,7 +4,7 @@ minetest.register_abm({
 	nodenames = {"default:dirt_with_snow"},
 	interval = 2,
 	chance = 20,
-	action = function(pos, node)
+	action = function(pos)
 		local name = minetest.get_node({x=pos.x, y=pos.y+1, z=pos.z}).name
 		local nodedef = minetest.registered_nodes[name]
 		if name ~= "ignore"
@@ -37,9 +37,9 @@ minetest.register_abm({
 		if intensity == 1 then
 			minetest.set_node(pos, {name="default:water_source"})
 		elseif intensity == 2 then
-	 		minetest.set_node(pos, {name="default:water_flowing", param2=7})
+			minetest.set_node(pos, {name="default:water_flowing", param2=7})
 		elseif intensity == 3 then
-	 		minetest.set_node(pos, {name="default:water_flowing", param2=3})
+			minetest.set_node(pos, {name="default:water_flowing", param2=3})
 		--[[	LazyJ, you need to add param2, which defines the amount of the flowing water ~ HybridDog 2015_03_06
 			This was causing "melts=2" nodes to just disappear so I changed it to replace the
 			node with a water_source for a couple seconds and then replace the water_source with
@@ -61,11 +61,11 @@ minetest.register_abm({
 											-- the water to flow and spread before the
 											-- water_source is changed to air. ~ LazyJ
 					if minetest.get_node(pos).name == "default:water_source" then
-	 					minetest.add_node(pos,{name="air"})
-	 				end
-	 			end)
+						 minetest.add_node(pos,{name="air"})
+					 end
+				 end)
 		--]]
-	 	else
+		 else
 			return
 		end
 	end,
@@ -78,7 +78,7 @@ minetest.register_abm({
 --Water freezes when in contact with snow.
 minetest.register_abm({
 	nodenames = {"default:water_source"},
-	 -- Added "group:icemaker" and snowbrick. ~ LazyJ
+	-- Added "group:icemaker" and snowbrick. ~ LazyJ
 	neighbors = {"default:snow", "default:snowblock", "snow:snow_brick", "group:icemaker"},
 	interval = 20,
 	chance = 4,
@@ -144,7 +144,7 @@ minetest.register_abm({
 	nodenames = {"snow:sapling_pine"},
 	interval = 10,
 	chance = 50,
-	action = function(pos, node)
+	action = function(pos)
 
 -- Check if there is enough vertical-space for the sapling to grow without
 -- hitting anything else.  ~ LazyJ, 2014_04_10
@@ -177,7 +177,7 @@ minetest.register_abm({
 	nodenames = {"snow:xmas_tree"},
 	interval = 10,
 	chance = 50,
-	action = function(pos, node)
+	action = function(pos)
 
 		-- 'If' there is air in each of the 8 nodes dirctly above the sapling,... ~LazyJ
 		for i = 1,8 do

src/falling_snow.lua

@@ -1,6 +1,6 @@
 -- Parameters
 
-function snow_fall(pos, player, animate)
+function snow_fall(pos)
 	local ground_y = nil
 	for y=pos.y+10,pos.y+20,1 do
 		local n = minetest.get_node({x=pos.x,y=y,z=pos.z}).name
@@ -128,7 +128,7 @@ if snow.enable_snowfall then
 				local freeze = nval_temp < 35
 				local precip = nval_prec < (nval_humid - 50) / 50 + PRECOFF and
 					nval_humid - grad * nval_temp > yint
-				
+
 				if snow.debug then
 					precip = true
 				end
@@ -173,9 +173,9 @@ if snow.enable_snowfall then
 					if freeze then
 						-- Snowfall
 						local extime = math.min((pposy + 12 - YLIMIT) / 2, 9)
-						
+
 						local x, y, z = pposx - 24 + math.random(0, 48), pposy + 12, pposz - 24 + math.random(0, 48)
-						
+
 						if not snow.lighter_snowfall then
 							snow_fall({
 										x = x,
@@ -183,11 +183,11 @@ if snow.enable_snowfall then
 										z = z
 									}, true)
 						end
-						
-						for flake = 1, FLAKES do
-							
+
+						for _ = 1, FLAKES do
+
 							x, y, z = pposx - 24 + math.random(0, 48), pposy + 12, pposz - 24 + math.random(0, 48)
-							
+
 							minetest.add_particle({
 								pos = {
 									x = x,

src/mapgen_v6.lua

@@ -577,7 +577,7 @@ local biome_strings = {
 	{"snowy", "plain", "alpine", "normal", "normal"},
 	{"cool", "icebergs", "icesheet", "icecave", "icehole"}
 }
-function biome_to_string(num,num2)
+function biome_to_string(num)
 	local biome = biome_strings[1][num] or "unknown "..num
 	return biome
 end

src/sled.lua

@@ -156,7 +156,7 @@ function sled:on_rightclick(player)
 	on_sled_click(self, player)
 end
 
-function sled:on_activate(staticdata, dtime_s)
+function sled:on_activate(staticdata)
 	self.object:set_armor_groups({immortal=1})
 	self.object:setacceleration({x=0, y=-10, z=0})
 	if staticdata then