[Revert] Reverts Ninja (#15516)

* Revert "[Antag] add space ninja as midround antag (#14069)"

This reverts commit c1cda0dbf8.

* Revert "[Fix] move ninja objectives into NinjaRole (#15490)"

This reverts commit 251f429fb3.

Content.Server/GameTicking/Rules/Configurations/NinjaRuleConfiguration.cs

@@ -1,66 +0,0 @@
-using Content.Server.Objectives;
-using Robust.Shared.Audio;
-using Robust.Shared.Prototypes;
-using Robust.Shared.Serialization;
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
-
-namespace Content.Server.GameTicking.Rules.Configurations;
-
-/// <summary>
-/// Configuration for the Space Ninja antag.
-/// </summary>
-public sealed class NinjaRuleConfiguration : StationEventRuleConfiguration
-{
-    /// <summary>
-    /// List of objective prototype ids to add
-    /// </summary>
-    [DataField("objectives", required: true, customTypeSerializer: typeof(PrototypeIdListSerializer<ObjectivePrototype>))]
-    public readonly List<string> Objectives = new();
-
-    // TODO: move to job and use job???
-    /// <summary>
-    /// List of implants to inject on spawn
-    /// </summary>
-    [DataField("implants", required: true, customTypeSerializer: typeof(PrototypeIdListSerializer<EntityPrototype>))]
-    public readonly List<string> Implants = new();
-
-    /// <summary>
-    /// List of threats that can be called in
-    /// </summary>
-    [DataField("threats", required: true)]
-    public readonly 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))]
-    public SoundSpecifier? GreetingSound = new SoundPathSpecifier("/Audio/Misc/ninja_greeting.ogg");
-
-    /// <summary>
-    /// Distance that the ninja spawns from the station's half AABB radius
-    /// </summary>
-    [DataField("spawnDistance")]
-    public float SpawnDistance = 20f;
-}
-
-/// <summary>
-/// A threat that can be called in to the station by a ninja hacking a communications console.
-/// Generally some kind of mid-round antag, though you could make it call in scrubber backflow if you wanted to.
-/// You wouldn't do that, right?
-/// </summary>
-[DataDefinition]
-public sealed class Threat
-{
-    /// <summary>
-    /// Locale id for the announcement to be made from CentCom.
-    /// </summary>
-    [DataField("announcement")]
-    public readonly string Announcement = default!;
-
-    /// <summary>
-    /// The game rule for the threat to be added, it should be able to work when added mid-round otherwise this will do nothing.
-    /// </summary>
-    [DataField("rule", customTypeSerializer: typeof(PrototypeIdSerializer<GameRulePrototype>))]
-    public readonly string Rule = default!;
-}