docs: Remove stale ISDN parameters

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@infradead.org>
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Assisted-by: Claude:claude-opus-4-6
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260502120206.1289126-1-costa.shul@redhat.com>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 4d0f545fb3ec5a1750d9112a851deb8fd976d32d..319dfea30133e0810d9d47ba66fc8401ec91a3d0 100644 (file)
--- 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