Use "discard" variable

Author: iSazonov

src/System.Management.Automation/engine/Utils.cs

@@ -897,16 +897,15 @@ internal static bool IsAdministrator()
 
         internal static bool ItemExists(string path)
         {
-            bool result = false;
             try
             {
-                result = ItemExists(path, out bool unused);
+                return ItemExists(path, out bool _);
             }
             catch
             {
             }
 
-            return result;
+            return false;
         }
 
         internal static bool ItemExists(string path, out bool isDirectory)

src/System.Management.Automation/namespaces/FileSystemProvider.cs

@@ -2893,7 +2893,7 @@ private void RemoveDirectoryInfoItem(DirectoryInfo directory, bool recurse, bool
 
                 try
                 {
-                    if (!Utils.ItemExists(directory.FullName, out bool unused))
+                    if (!Utils.ItemExists(directory.FullName, out bool _))
                     {
                         // Directory does not exist
                         return;
@@ -3219,7 +3219,7 @@ private bool ItemExists(string path, out ErrorRecord error)
 
             try
             {
-                result = Utils.ItemExists(path, out bool unused);
+                result = Utils.ItemExists(path, out bool _);
 
                 FileSystemItemProviderDynamicParameters itemExistsDynamicParameters =
                     DynamicParameters as FileSystemItemProviderDynamicParameters;