docs: kernel-parameters: Remove sa1100ir IrDA parameter

The sa1100ir parameter referenced drivers/net/irda/sa1100_ir.c,
which was removed along with the entire IrDA stack in commit d64c2a7
("staging: irda: remove the irda network stack and drivers").

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260531135455.4113157-1-costa.shul@redhat.com>

Author: makelinux

Documentation/admin-guide/kernel-parameters.txt

@@ -6786,8 +6786,6 @@ Kernel parameters
 			restrictions other than those given by hardware at the
 			cost of significant additional memory use for tables.
 
-	sa1100ir	[NET]
-			See drivers/net/irda/sa1100_ir.c.
 
 	sched_proxy_exec= [KNL]
 			Enables or disables "proxy execution" style