Update documentation for body system code (#2556)

Content.Shared/GameObjects/Components/Body/Part/IBodyPartContainer.cs

@@ -1,14 +1,8 @@
 namespace Content.Shared.GameObjects.Components.Body.Part
 {
     /// <summary>
-    ///     Making a class inherit from this interface allows you to do many
-    ///     things with it in the <see cref="SurgeryData"/> class.
-    ///     This includes passing it as an argument to a
-    ///     <see cref="SurgeryData.SurgeryAction"/> delegate, as to later typecast
-    ///     it back to the original class type.
-    ///     Every BodyPart also needs an <see cref="IBodyPartContainer"/> to be
-    ///     its parent (i.e. the <see cref="IBody"/> holds many
-    ///     <see cref="IBodyPart"/>s, each of which have an upward reference to it).
+    ///     Defines a component as being capable of containing parts.
+    ///     Used during surgery.
     /// </summary>
     // TODO BODY Remove
     public interface IBodyPartContainer