Revert "add lazy loading for entities"

This reverts commit ac6e4b51a9.

ReallifeGamemode.Server/Entities/UserItem.cs

@@ -21,7 +21,7 @@ namespace ReallifeGamemode.Server.Entities
 
         [ForeignKey("User")]
         public int UserId { get; set; }
-        public virtual User User { get; set; }
+        public User User { get; set; }
 
         public int Amount { get; set; }
         public int Slot { get; set; }