time: x86: report_lost_ticks doesn't exist any more

'report_lost_ticks' parameter has been removed back in 2007 through
1489939f ("time: x86_64: convert x86_64 to use GENERIC_TIME").
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Documentation/x86/x86_64/boot-options.txt

@@ -112,10 +112,6 @@ Timing
   This can be used to work around timing problems on multiprocessor systems
   with not properly synchronized CPUs.
 
-  report_lost_ticks
-  Report when timer interrupts are lost because some code turned off
-  interrupts for too long.
-
   nohpet
   Don't use the HPET timer.