Convert materials to use PhysicalComposition (#15414)

Content.Shared/Materials/MaterialComponent.cs

@@ -1,16 +1,13 @@
 using Robust.Shared.GameStates;
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Dictionary;
 
-namespace Content.Shared.Materials
+namespace Content.Shared.Materials;
+/// <summary>
+/// Empty component that marks an entity as a "raw" material.
+/// The material amounts themselves are in <see cref="PhysicalCompositionComponent"/>
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed class MaterialComponent : Component
 {
-    /// <summary>
-    ///     Component to store data such as "this object is made out of steel".
-    ///     This is not a storage system for say smelteries.
-    /// </summary>
-    [RegisterComponent, NetworkedComponent]
-    public sealed class MaterialComponent : Component
-    {
-        [DataField("materials", customTypeSerializer:typeof(PrototypeIdDictionarySerializer<int, MaterialPrototype>))]
-        public readonly Dictionary<string, int> Materials = new();
-    }
+
 }
+