Remove the unused local variable 'length' (#40693)

#30457
In line 292, remove the unused variable 'length'.

Thanks.

diff --git a/src/libraries/System.Security.AccessControl/src/System/Security/AccessControl/SecurityDescriptor.cs b/src/libraries/System.Security.AccessControl/src/System/Security/AccessControl/SecurityDescriptor.cs
index 688446b..80e6780 100644 (file)
--- a/src/libraries/System.Security.AccessControl/src/System/Security/AccessControl/SecurityDescriptor.cs
+++ b/src/libraries/System.Security.AccessControl/src/System/Security/AccessControl/SecurityDescriptor.cs
@@ -289,8 +289,6 @@ namespace System.Security.AccessControl
             // Populate the header
             //
 
-            int length = BinaryLength;
-
             byte rmControl =
                 ((this is RawSecurityDescriptor rsd) &&
                  ((ControlFlags & ControlFlags.RMControlValid) != 0)) ? (rsd.ResourceManagerControl) : (byte)0;