Fixes master 514 (#5927)

* a

* l

* Update sheet_types.dm

code/datums/mapgen/CaveGenerator.dm

@@ -52,10 +52,6 @@
 
 	for(var/i in turfs) //Go through all the turfs and generate them
 		var/turf/gen_turf = i
-		//SKYRAT EDIT ADDITION
-		if(istype(gen_turf, /turf/open/space/mirage))
-			continue
-		//SKYRAT EDIT END
 
 		var/area/A = gen_turf.loc
 		if(!(A.area_flags & CAVES_ALLOWED))