Revert "Gamerule Entities" (#15724)

Content.Client/Suspicion/SuspicionEndTimerSystem.cs

@@ -0,0 +1,23 @@
+using System;
+using Content.Shared.Suspicion;
+using Robust.Shared.GameObjects;
+
+namespace Content.Client.Suspicion
+{
+    public sealed class SuspicionEndTimerSystem : EntitySystem
+    {
+        public TimeSpan? EndTime { get; private set; }
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeNetworkEvent<SuspicionMessages.SetSuspicionEndTimerMessage>(RxTimerMessage);
+        }
+
+        private void RxTimerMessage(SuspicionMessages.SetSuspicionEndTimerMessage ev)
+        {
+            EndTime = ev.EndTime;
+        }
+    }
+}