Remove constructor side effects and remove unneeded parameterless constructors

Jellyfin.Data/Entities/Preference.cs

@@ -23,14 +23,6 @@ namespace Jellyfin.Data.Entities
             Value = value ?? throw new ArgumentNullException(nameof(value));
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="Preference"/> class.
-        /// Default constructor. Protected due to required properties, but present because EF needs it.
-        /// </summary>
-        protected Preference()
-        {
-        }
-
         /// <summary>
         /// Gets or sets the id of this preference.
         /// </summary>