Removes Bluespace Crystals and Diamonds from emergency roller bed's r…

…ecipe (tgstation#80190)

## About The Pull Request

This PR _should_ remove the 0.5 sheets of bluespace crystals and
diamonds required in the "Medical Bed (Emergency)" recipe.

## Why It's Good For The Game

The roller bed just seems like an ordinary item, it IS an ordinary item,
and functions like an ordinary item. I see no reason that it would
require bluespace crystals, since it doesn't use any sort of bluespace
wizardry. SURE it would make sense.. if you could fit 5 patients in one
roller bed and then fold it then fit it in your bag, but right now?
Yeah, it doesn't. Besides: It's already locked behind Research, and
bluespace crystals are already a valuable enough resource.

and then we have the diamonds. Why does a **roller bed** require
diamonds? Sure, titanium makes sense, for the integrity of the roller
bed, but... Diamonds? It's already a scarce enough material that runs
out pretty quickly, and it's not so much better than wheelchairs (5
Iron)

## Proof of Testing

<details>
<summary>Screenshots/Videos</summary>


![image](https://github.com/tgstation/tgstation/assets/109750345/a3938afe-4631-4ef8-b1df-cdc49dacd7ab)

![image](https://github.com/tgstation/tgstation/assets/109750345/4fdf25af-b231-47d9-9459-5ffda508b4b0)

![image](https://github.com/tgstation/tgstation/assets/109750345/336cf307-f5eb-4d51-a615-8e80f1cf6b5d)


</details>

## Changelog
:cl: KannaLisvern
qol: Removed Bluespace Crystals and Diamonds from medical emergency
bed's recipe.
/:cl:

code/modules/research/designs/medical_designs.dm

@@ -352,7 +352,7 @@
 	desc = "A portable, foldable version of the medical bed. Perfect for paramedics or whenever you have mass casualties!"
 	id = "medicalbed_emergency"
 	build_type = PROTOLATHE | AWAY_LATHE
-	materials = list(/datum/material/titanium = SHEET_MATERIAL_AMOUNT * 2.7, /datum/material/plastic = SHEET_MATERIAL_AMOUNT * 1.7, /datum/material/diamond = SMALL_MATERIAL_AMOUNT * 5, /datum/material/bluespace = SMALL_MATERIAL_AMOUNT * 5)
+	materials = list(/datum/material/titanium = SHEET_MATERIAL_AMOUNT * 2.7, /datum/material/plastic = SHEET_MATERIAL_AMOUNT * 1.7)
 	build_path = /obj/item/emergency_bed
 	category = list(
 		RND_CATEGORY_EQUIPMENT + RND_SUBCATEGORY_EQUIPMENT_MEDICAL