xfs: remove deprecated sysctl options

These optionr were for Irix compatibility, probably for clustered XFS
clients in a heterogenous cluster which contained both Irix & Linux
machines, so that behavior would be consistent. That doesn't exist anymore
and it's no longer needed.

Signed-off-by: Pavel Reichl <preichl@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: actually state when the sysctls go away]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
diff --git a/Documentation/admin-guide/xfs.rst b/Documentation/admin-guide/xfs.rst
index 9ef81be..86de8a1 100644
--- a/Documentation/admin-guide/xfs.rst
+++ b/Documentation/admin-guide/xfs.rst
@@ -356,7 +356,12 @@
 Deprecated Sysctls
 ==================
 
-None at present.
+===========================     ================
+  Name				Removal Schedule
+===========================     ================
+fs.xfs.irix_sgid_inherit        September 2025
+fs.xfs.irix_symlink_mode        September 2025
+===========================     ================
 
 
 Removed Sysctls