Fix undeclared global warnings

init.lua

@@ -345,11 +345,6 @@ minetest.register_on_generated(function(minp, maxp, seed)
 			minetest.log("verbose", "[tsm_pyramids] Pyramid not placed, no suitable surface. minp="..minetest.pos_to_string(minp))
 			return
 		end
-		-- Select the material type by the most prominent node type
-		-- E.g. if desert sand is most prominent, we place a desert sandstone pyramid
-		if sand_cnt_max_id then
-			sand = sands[sand_cnt_max_id]
-		end
 		if p2.y < PYRA_MIN_Y then
 			minetest.log("info", "[tsm_pyramids] Pyramid not placed, too deep. p2="..minetest.pos_to_string(p2))
 			return

room.lua

@@ -1118,10 +1118,8 @@ function tsm_pyramids.make_traps(pos, stype, rotations, layout_room)
 	local trap_node
 	if deep_trap then
 		trap_node = " "
-		depth = 14
 	else
 		trap_node = "~"
-		depth = 7
 	end
 	local wmin, wmax = -1,9
 	local hole = {x=pos.x+7,y=pos.y, z=pos.z+7}