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/gamemodes/wizard/artefact.dm

@@ -208,7 +208,7 @@
 	lefthand_file = 'icons/mob/inhands/weapons/swords_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/weapons/swords_righthand.dmi'
 	hitsound = 'sound/weapons/bladeslice.ogg'
-	flags_1 = CONDUCT_1
+	flags = CONDUCT
 	slot_flags = SLOT_BELT
 	sharpness = IS_SHARP
 	force = 20

code/game/gamemodes/wizard/spellbook.dm

@@ -213,7 +213,7 @@
 
 /datum/spellbook_entry/lightningbolt/Buy(mob/living/carbon/human/user,obj/item/weapon/spellbook/book) //return 1 on success
 	. = ..()
-	user.flags_2 |= TESLA_IGNORE_2
+	SET_SECONDARY_FLAG(user, TESLA_IGNORE)
 
 /datum/spellbook_entry/infinite_guns
 	name = "Lesser Summon Guns"
@@ -865,7 +865,7 @@
 	if(ishuman(user))
 		to_chat(user,"<font size='15' color='red'><b>HOR-SIE HAS RISEN</b></font>")
 		var/obj/item/clothing/mask/horsehead/magichead = new /obj/item/clothing/mask/horsehead
-		magichead.flags_1 |= NODROP_1		//curses!
+		magichead.flags |= NODROP		//curses!
 		magichead.flags_inv &= ~HIDEFACE //so you can still see their face
 		magichead.voicechange = 1	//NEEEEIIGHH
 		if(!user.dropItemToGround(user.wear_mask))