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/mirror.dm

@@ -4,8 +4,8 @@
 	desc = "Mirror mirror on the wall, who's the most robust of them all?"
 	icon = 'icons/obj/watercloset.dmi'
 	icon_state = "mirror"
-	density = FALSE
-	anchored = TRUE
+	density = FALSE
+	anchored = TRUE
 	max_integrity = 200
 	integrity_failure = 100
 
@@ -47,14 +47,14 @@
 	..()
 
 /obj/structure/mirror/obj_break(damage_flag)
-	if(!broken && !(flags_1 & NODECONSTRUCT_1))
+	if(!broken && !(flags & NODECONSTRUCT))
 		icon_state = "mirror_broke"
 		playsound(src, "shatter", 70, 1)
 		desc = "Oh no, seven years of bad luck!"
 		broken = 1
 
 /obj/structure/mirror/deconstruct(disassembled = TRUE)
-	if(!(flags_1 & NODECONSTRUCT_1))
+	if(!(flags & NODECONSTRUCT))
 		if(!disassembled)
 			new /obj/item/weapon/shard( src.loc )
 	qdel(src)