Revert "12/21 modernizations from TG live"

code/datums/material_container.dm

@@ -26,6 +26,7 @@
 	for(var/mat_type in subtypesof(/datum/material))
 		var/datum/material/MT = mat_type
 		possible_mats[initial(MT.id)] = mat_type
+
 	for(var/id in mat_list)
 		if(possible_mats[id])
 			var/mat_path = possible_mats[id]
@@ -137,8 +138,6 @@
 
 //For spawning mineral sheets; internal use only
 /datum/material_container/proc/retrieve(sheet_amt, datum/material/M)
-	if(!M.sheet_type)
-		return 0
 	if(sheet_amt > 0)
 		if(M.amount < (sheet_amt * MINERAL_MATERIAL_AMOUNT))
 			sheet_amt = round(M.amount / MINERAL_MATERIAL_AMOUNT)
@@ -217,13 +216,11 @@
 	var/amount = 0
 	var/id = null
 	var/sheet_type = null
-	var/coin_type = null
 
 /datum/material/metal
 	name = "Metal"
 	id = MAT_METAL
 	sheet_type = /obj/item/stack/sheet/metal
-	coin_type = /obj/item/weapon/coin/iron
 
 /datum/material/glass
 	name = "Glass"
@@ -234,43 +231,28 @@
 	name = "Silver"
 	id = MAT_SILVER
 	sheet_type = /obj/item/stack/sheet/mineral/silver
-	coin_type = /obj/item/weapon/coin/silver
 
 /datum/material/gold
 	name = "Gold"
 	id = MAT_GOLD
 	sheet_type = /obj/item/stack/sheet/mineral/gold
-	coin_type = /obj/item/weapon/coin/gold
 
 /datum/material/diamond
 	name = "Diamond"
 	id = MAT_DIAMOND
 	sheet_type = /obj/item/stack/sheet/mineral/diamond
-	coin_type = /obj/item/weapon/coin/diamond
 
 /datum/material/uranium
 	name = "Uranium"
 	id = MAT_URANIUM
 	sheet_type = /obj/item/stack/sheet/mineral/uranium
-	coin_type = /obj/item/weapon/coin/uranium
 
 /datum/material/plasma
 	name = "Solid Plasma"
 	id = MAT_PLASMA
 	sheet_type = /obj/item/stack/sheet/mineral/plasma
-	coin_type = /obj/item/weapon/coin/plasma
 
 /datum/material/bananium
 	name = "Bananium"
 	id = MAT_BANANIUM
 	sheet_type = /obj/item/stack/sheet/mineral/bananium
-	coin_type = /obj/item/weapon/coin/clown
-
-/datum/material/titanium
-	name = "Titanium"
-	id = MAT_TITANIUM
-	sheet_type = /obj/item/stack/sheet/mineral/titanium
-
-/datum/material/biomass
-	name = "Biomass"
-	id = MAT_BIOMASS