[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/Administration/Systems/AdminVerbSystem.Antags.cs

@@ -1,6 +1,5 @@
 using Content.Server.GameTicking.Rules;
 using Content.Server.Mind.Components;
-using Content.Server.Ninja.Systems;
 using Content.Server.Zombies;
 using Content.Shared.Administration;
 using Content.Shared.Database;
@@ -15,7 +14,6 @@ public sealed partial class AdminVerbSystem
 {
     [Dependency] private readonly ZombifyOnDeathSystem _zombify = default!;
     [Dependency] private readonly TraitorRuleSystem _traitorRule = default!;
-    [Dependency] private readonly NinjaSystem _ninja = default!;
     [Dependency] private readonly NukeopsRuleSystem _nukeopsRule = default!;
     [Dependency] private readonly PiratesRuleSystem _piratesRule = default!;
 
@@ -104,21 +102,5 @@ public sealed partial class AdminVerbSystem
         };
         args.Verbs.Add(pirate);
 
-        Verb spaceNinja = new()
-        {
-            Text = "Make space ninja",
-            Category = VerbCategory.Antag,
-            Icon = new SpriteSpecifier.Rsi(new ResourcePath("/Textures/Objects/Weapons/Melee/energykatana.rsi"), "icon"),
-            Act = () =>
-            {
-                if (targetMindComp.Mind == null || targetMindComp.Mind.Session == null)
-                    return;
-
-                _ninja.MakeNinja(targetMindComp.Mind);
-            },
-            Impact = LogImpact.High,
-            Message = Loc.GetString("admin-verb-make-space-ninja"),
-        };
-        args.Verbs.Add(spaceNinja);
     }
 }