Makes blob spores/blobbers and mice GC properly (#17237)

code/modules/mob/living/simple_animal/friendly/mouse.dm

@@ -212,9 +212,9 @@
 	var/datum/mind/blobmind = mind
 	var/client/C = client
 	if(istype(blobmind) && istype(C))
-		blobmind.special_role = SPECIAL_ROLE_BLOB
 		var/obj/structure/blob/core/core = new(T, C, 3)
 		core.lateblobtimer()
+		qdel(blobmind) // Delete the old mind. THe blob will make a new one
 	else
 		new /obj/structure/blob/core(T) // Ghosts will be prompted to control it.
 	if(ismob(loc)) // in case some taj/etc ate the mouse.