style: removing unused code (#2287)

Author: jeffreyrainy

com.unity.netcode.gameobjects/Tests/Runtime/NetworkShowHideTests.cs

@@ -8,11 +8,6 @@
 
 namespace Unity.Netcode.RuntimeTests
 {
-    public class NetworkShowHideTestComponent : NetworkBehaviour
-    {
-
-    }
-
     public class ShowHideObject : NetworkBehaviour
     {
         public static List<ShowHideObject> ClientTargetedNetworkObjects = new List<ShowHideObject>();
@@ -94,11 +89,6 @@ public class NetworkShowHideTests : NetcodeIntegrationTest
         private NetworkObject m_Object2OnClient0;
         private NetworkObject m_Object3OnClient0;
 
-        protected override void OnCreatePlayerPrefab()
-        {
-            var networkTransform = m_PlayerPrefab.AddComponent<NetworkShowHideTestComponent>();
-        }
-
         protected override void OnServerAndClientsCreated()
         {
             m_PrefabToSpawn = CreateNetworkObjectPrefab("ShowHideObject");