[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/Objectives/Conditions/SpiderChargeCondition.cs

@@ -1,70 +0,0 @@
-using Content.Server.Ninja.Systems;
-using Content.Server.Objectives.Interfaces;
-using Content.Server.Warps;
-using Robust.Shared.Random;
-using Robust.Shared.Utility;
-
-namespace Content.Server.Objectives.Conditions;
-
-[DataDefinition]
-public sealed class SpiderChargeCondition : IObjectiveCondition
-{
-    private Mind.Mind? _mind;
-
-    public IObjectiveCondition GetAssigned(Mind.Mind mind)
-    {
-        return new SpiderChargeCondition {
-            _mind = mind
-        };
-    }
-
-    public string Title
-    {
-        get
-        {
-            var entMan = IoCManager.Resolve<IEntityManager>();
-            if (!NinjaSystem.GetNinjaRole(_mind, out var role)
-                || role.SpiderChargeTarget == null
-                || !entMan.TryGetComponent<WarpPointComponent>(role.SpiderChargeTarget, out var warp)
-                || warp.Location == null)
-                // this should never really happen but eh
-                return Loc.GetString("objective-condition-spider-charge-no-target");
-
-            return Loc.GetString("objective-condition-spider-charge-title", ("location", warp.Location));
-        }
-    }
-
-    public string Description => Loc.GetString("objective-condition-spider-charge-description");
-
-    public SpriteSpecifier Icon => new SpriteSpecifier.Rsi(new ResourcePath("Objects/Weapons/Bombs/spidercharge.rsi"), "icon");
-
-    public float Progress
-    {
-        get
-        {
-            if (!NinjaSystem.GetNinjaRole(_mind, out var role))
-                return 0f;
-
-            return role.SpiderChargeDetonated ? 1f : 0f;
-        }
-    }
-
-    public float Difficulty => 2.5f;
-
-    public bool Equals(IObjectiveCondition? other)
-    {
-        return other is SpiderChargeCondition cond && Equals(_mind, cond._mind);
-    }
-
-    public override bool Equals(object? obj)
-    {
-        if (ReferenceEquals(null, obj)) return false;
-        if (ReferenceEquals(this, obj)) return true;
-        return obj is SpiderChargeCondition cond && cond.Equals(this);
-    }
-
-    public override int GetHashCode()
-    {
-        return _mind?.GetHashCode() ?? 0;
-    }
-}