effect cleanup (#7502)

yeah, also updates emissive blockers

code/game/objects/effects/effect_system/effect_system.dm

@@ -0,0 +1,32 @@
+
+/obj/effect/particle_effect
+	name = "particle effect"
+	pass_flags = ATOM_PASS_TABLE | ATOM_PASS_GRILLE
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+	anchored = TRUE
+
+/datum/effect_system
+	var/number = 3
+	var/cardinals = 0
+	var/turf/location
+	var/atom/holder
+	var/setup = 0
+
+/datum/effect_system/Destroy()
+	holder = null
+	location = null
+	return..()
+
+/datum/effect_system/proc/set_up(n = 3, c = 0, turf/loc)
+	if(n > 10)
+		n = 10
+	number = n
+	cardinals = c
+	location = loc
+	setup = 1
+
+/datum/effect_system/proc/attach(atom/atom)
+	holder = atom
+
+/datum/effect_system/proc/start()
+