Revert "[MIRROR] Replace all secondary flags with bitflags stored in the flags_2 var" (#2457)

ok you know what yeah i think i'll properly mirror https://github.com/Citadel-Station-13/Citadel-Station-13/pull/2411

code/game/objects/structures/flora.dm

@@ -14,7 +14,7 @@
 	var/log_amount = 10
 
 /obj/structure/flora/tree/attackby(obj/item/weapon/W, mob/user, params)
-	if(!cut && log_amount && (!(NODECONSTRUCT_1 in flags_1)))
+	if(!cut && log_amount && (!(NODECONSTRUCT in flags)))
 		if(W.sharpness && W.force > 0)
 			if(W.hitsound)
 				playsound(get_turf(src), W.hitsound, 100, 0, 0)