Remove OS information from System Info (#9175)

Co-authored-by: Bond-009 <bond.009@outlook.com>

MediaBrowser.Model/System/OperatingSystemId.cs

@@ -1,12 +0,0 @@
-#pragma warning disable CS1591
-
-namespace MediaBrowser.Model.System
-{
-    public enum OperatingSystemId
-    {
-        Windows,
-        Linux,
-        Darwin,
-        BSD
-    }
-}

MediaBrowser.Model/System/PublicSystemInfo.cs

@@ -1,6 +1,8 @@
 #nullable disable
 #pragma warning disable CS1591
 
+using System;
+
 namespace MediaBrowser.Model.System
 {
     public class PublicSystemInfo
@@ -32,7 +34,8 @@ namespace MediaBrowser.Model.System
         /// Gets or sets the operating system.
         /// </summary>
         /// <value>The operating system.</value>
-        public string OperatingSystem { get; set; }
+        [Obsolete("This is no longer set")]
+        public string OperatingSystem { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the id.

MediaBrowser.Model/System/SystemInfo.cs

@@ -42,7 +42,8 @@ namespace MediaBrowser.Model.System
         /// Gets or sets the display name of the operating system.
         /// </summary>
         /// <value>The display name of the operating system.</value>
-        public string OperatingSystemDisplayName { get; set; }
+        [Obsolete("This is no longer set")]
+        public string OperatingSystemDisplayName { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the package name.
@@ -137,6 +138,7 @@ namespace MediaBrowser.Model.System
         [Obsolete("This isn't set correctly anymore")]
         public FFmpegLocation EncoderLocation { get; set; }
 
-        public Architecture SystemArchitecture { get; set; }
+        [Obsolete("This is no longer set")]
+        public Architecture SystemArchitecture { get; set; } = Architecture.X64;
     }
 }