Remove unused machine board field

Content.Server/GameObjects/Components/Construction/MachineBoardComponent.cs

@@ -25,15 +25,6 @@ namespace Content.Server.GameObjects.Components.Construction
         [ViewVariables]
         private Dictionary<string, ComponentPartInfo> _componentRequirements;
 
-        /// <summary>
-        ///     So, what happens if you spawn a machine from the entity spawning menu?
-        ///     It should probably have all parts, including the component parts...
-        ///     This is where this fancy little dictionary comes in!
-        ///     This maps component name types to entity prototype IDs to be used as defaults.
-        /// </summary>
-        [ViewVariables]
-        private Dictionary<string, string> _componentDefaults;
-
         [ViewVariables(VVAccess.ReadWrite)]
         public string Prototype { get; private set; }
         public IReadOnlyDictionary<MachinePart, int> Requirements => _requirements;