[PATCH v2] docs: Remove stale ISDN parameters

[Costa Shulyupin]

The icn= and pcbit= parameters referenced drivers removed in
commit 02bbd9802da7 ("staging: i4l: delete the whole thing").

Remove the stale parameter entries and the now-unused ISDN tag
from the legend.

Suggested-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Assisted-by: Claude:claude-opus-4-6
---
v2: Remove pcbit= and ISDN too
    Address comments of Randy Dunlap
V1: Remove icn=

Signed-off-by: Costa Shulyupin <costa.shul@xxxxxxxxxx>
---
 Documentation/admin-guide/kernel-parameters.txt | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index c13c354728bb..96c189e5f5bf 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -24,7 +24,6 @@
 	IP_PNP	IP DHCP, BOOTP, or RARP is enabled.
 	IPV6	IPv6 support is enabled.
 	ISAPNP	ISA PnP code is enabled.
-	ISDN	Appropriate ISDN support is enabled.
 	ISOL	CPU Isolation is enabled.
 	JOY	Appropriate joystick support is enabled.
 	KGDB	Kernel debugger support is enabled.
@@ -2245,9 +2244,6 @@ Kernel parameters
 			syscalls, essentially overriding IA32_EMULATION_DEFAULT_DISABLED at
 			boot time. When false, unconditionally disables IA32 emulation.
 
-	icn=		[HW,ISDN]
-			Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
-
 
 	idle=		[X86,EARLY]
 			Format: idle=poll, idle=halt, idle=nomwait
@@ -5037,8 +5033,6 @@ Kernel parameters
 			the specified number of seconds.  This is to be used if
 			your oopses keep scrolling off the screen.
 
-	pcbit=		[HW,ISDN]
-
 	pci=option[,option...]	[PCI,EARLY] various PCI subsystem options.
 
 				Some options herein operate on a specific device
-- 
2.53.0