move ninja objectives code into generic antag system (#20186)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/GameTicking/Rules/Components/NinjaRuleComponent.cs

@@ -1,36 +1,25 @@
 using Content.Server.Ninja.Systems;
 using Content.Shared.Communications;
 using Robust.Shared.Audio;
-using Robust.Shared.Prototypes;
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
 
 namespace Content.Server.GameTicking.Rules.Components;
 
+/// <summary>
+/// Stores some configuration used by the ninja system.
+/// Objectives and roundend summary are handled by <see cref="GenericAntagRuleComponent/">.
+/// </summary>
 [RegisterComponent, Access(typeof(SpaceNinjaSystem))]
 public sealed partial class NinjaRuleComponent : Component
 {
-    /// <summary>
-    /// All ninja minds that are using this rule.
-    /// Their SpaceNinjaComponent Rule field should point back to this rule.
-    /// </summary>
-    [DataField("minds")]
-    public List<EntityUid> Minds = new();
-
-    /// <summary>
-    /// List of objective entity prototypes to add
-    /// </summary>
-    [DataField("objectives", required: true, customTypeSerializer: typeof(PrototypeIdListSerializer<EntityPrototype>))]
-    public List<string> Objectives = new();
-
     /// <summary>
     /// List of threats that can be called in. Copied onto <see cref="CommsHackerComponent"/> when gloves are enabled.
     /// </summary>
-    [DataField("threats", required: true)]
+    [DataField(required: true)]
     public List<Threat> Threats = new();
 
     /// <summary>
     /// Sound played when making the player a ninja via antag control or ghost role
     /// </summary>
-    [DataField("greetingSound", customTypeSerializer: typeof(SoundSpecifierTypeSerializer))]
+    [DataField]
     public SoundSpecifier? GreetingSound = new SoundPathSpecifier("/Audio/Misc/ninja_greeting.ogg");
 }