Documentation: Remove unused "nps_mtm_hs_ctr" from kernel-parameters.txt

The "nps_mtm_hs_ctr" parameter has been removed in commit dd7c7ab0
("ARC: [plat-eznps]: Drop support for EZChip NPS platform"). Remove it
from the documentation now, too.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240614190804.602970-1-thuth@redhat.com

Documentation/admin-guide/kernel-parameters.txt

@@ -4125,15 +4125,6 @@
 			parameter, xsave area per process might occupy more
 			memory on xsaves enabled systems.
 
-	nps_mtm_hs_ctr=	[KNL,ARC]
-			This parameter sets the maximum duration, in
-			cycles, each HW thread of the CTOP can run
-			without interruptions, before HW switches it.
-			The actual maximum duration is 16 times this
-			parameter's value.
-			Format: integer between 1 and 255
-			Default: 255
-
 	nptcg=		[IA-64] Override max number of concurrent global TLB
 			purges which is reported from either PAL_VM_SUMMARY or
 			SAL PALO.