Remove the not-working 'run Update-Help from Get-Help when Get-Help runs for the first time' feature (#10974)

src/System.Management.Automation/help/UpdatableHelpSystem.cs

@@ -1500,52 +1500,6 @@ namespace System.Management.Automation.Help
             return string.IsNullOrEmpty(defaultSourcePath) ? null : defaultSourcePath;
         }
 
-        /// <summary>
-        /// Sets the DisablePromptToUpdatableHelp regkey.
-        /// </summary>
-        internal static void SetDisablePromptToUpdateHelp()
-        {
-            try
-            {
-                PowerShellConfig.Instance.SetDisablePromptToUpdateHelp(true);
-            }
-            catch (UnauthorizedAccessException)
-            {
-                // Ignore AccessDenied related exceptions
-            }
-            catch (SecurityException)
-            {
-                // Ignore AccessDenied related exceptions
-            }
-        }
-
-        /// <summary>
-        /// Checks if it is necessary to prompt to update help.
-        /// </summary>
-        /// <returns></returns>
-        internal static bool ShouldPromptToUpdateHelp()
-        {
-#if UNIX
-            // TODO: This workaround needs to be removed once updatable help
-            //       works on Linux.
-            return false;
-#else
-            try
-            {
-                if (!Utils.IsAdministrator())
-                {
-                    return false;
-                }
-
-                return PowerShellConfig.Instance.GetDisablePromptToUpdateHelp();
-            }
-            catch (SecurityException)
-            {
-                return false;
-            }
-#endif
-        }
-
         #endregion
 
         #region Events