Ports "Removes the absolute istype fest from footsteps" (#12259)

* Ports "Removes the absolute istype fest from footsteps"

* Update species.dm

code/modules/mob/living/simple_animal/slime/slime.dm

@@ -64,8 +64,6 @@
 	var/mutator_used = FALSE //So you can't shove a dozen mutators into a single slime
 	var/force_stasis = FALSE
 
-	do_footstep = TRUE
-
 	var/static/regex/slime_name_regex = new("\\w+ (baby|adult) slime \\(\\d+\\)")
 	///////////TIME FOR SUBSPECIES
 
@@ -103,6 +101,7 @@
 	create_reagents(100, NONE, NO_REAGENTS_VALUE)
 	set_colour(new_colour)
 	. = ..()
+	AddComponent(/datum/component/footstep, FOOTSTEP_MOB_SLIME, 7.5)
 
 /mob/living/simple_animal/slime/Destroy()
 	for (var/A in actions)