Revert "Merge branch 'tool_behavior-replacing' of https://github.com/SandPoot/Citadel-Station-13 into tool_behavior-replacing"

This reverts commit 2e29f30fdf, reversing
changes made to 724910cfab.

code/game/objects/structures/signs/_signs.dm

@@ -26,7 +26,7 @@
 			playsound(loc, 'sound/items/welder.ogg', 80, 1)
 
 /obj/structure/sign/attackby(obj/item/I, mob/user, params)
-	if(I.tool_behaviour == TOOL_WRENCH && buildable_sign)
+	if(istype(I, /obj/item/wrench) && buildable_sign)
 		user.visible_message("<span class='notice'>[user] starts removing [src]...</span>", \
 							 "<span class='notice'>You start unfastening [src].</span>")
 		I.play_tool_sound(src)