Cleaned up some turf decals, fixed beach away mission (#2152)

code/game/objects/effects/decals/decal.dm

@@ -63,8 +63,20 @@
 /obj/effect/turf_decal/sand
 	icon_state = "sandyfloor"
 
+/obj/effect/turf_decal/sand/warning
+	icon_state = "sandy_warn"
+
+/obj/effect/turf_decal/sand/warning/corner
+	icon_state = "sandy_warn_corner"
+
 /obj/effect/turf_decal/sand/plating
 	icon_state = "sandyplating"
 
+/obj/effect/turf_decal/sand/plating/warning
+	icon_state = "sandy_plating_warn"
+
+/obj/effect/turf_decal/sand/plating/warning/corner
+	icon_state = "sandy_plating_warn_corner"
+
 /obj/effect/turf_decal/plaque
 	icon_state = "plaque"

code/game/objects/effects/decals/misc.dm

@@ -20,12 +20,6 @@
 	pass_flags = PASSTABLE | PASSGRILLE
 	layer = FLY_LAYER
 
-/obj/effect/decal/sandeffect
-	name = "sandy tile"
-	icon = 'icons/turf/floors.dmi'
-	icon_state = "sandeffect"
-	layer = ABOVE_OPEN_TURF_LAYER
-
 /obj/effect/decal/fakelattice
 	name = "lattice"
 	desc = "A lightweight support lattice."

code/game/turfs/simulated/floor/plasteel_floor.dm

@@ -244,11 +244,6 @@
 	icon_state = "blueyellow"
 
 
-/turf/open/floor/plasteel/warningline
-	icon_state = "warningline"
-/turf/open/floor/plasteel/warningline/corner
-	icon_state = "warninglinecorners"
-
 /turf/open/floor/plasteel/yellowsiding
 	icon_state = "yellowsiding"
 /turf/open/floor/plasteel/yellowsiding/corner
@@ -399,16 +394,3 @@
 
 /turf/open/floor/plasteel/sepia
 	icon_state = "sepia"
-
-/turf/open/floor/plasteel/sandy
-	icon_state = "sandy"
-	baseturf = /turf/open/floor/plating/beach/sand
-
-/turf/open/floor/plasteel/sandeffect
-	icon_state = "sandeffect"
-
-/turf/open/floor/plasteel/sandeffect/warning
-	icon_state = "warningsandeffect"
-
-/turf/open/floor/plasteel/sandeffect/warning/corner
-	icon_state = "warningsandeffectcorners"