Impact: documentation fix
irqbalance was removed by:
  commit 
8b8e8c1bf7275eca859fe551dfa484134eaf013b
  Author: Yinghai Lu <yhlu.kernel@gmail.com>
  Date:   Tue Aug 19 20:50:23 2008 -0700
Remove the associated documentation for noirqbalance.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
                        Valid arguments: on, off
                        Default: on
 
-       noirqbalance    [X86-32,SMP,KNL] Disable kernel irq balancing
-
        noirqdebug      [X86-32] Disables the code which attempts to detect and
                        disable unhandled interrupt sources.