[PATCH v1 3/3] doc/power: remove empty poll documentation

[Pattan, Reshma]

> -----Original Message-----
> From: David Hunt <david.hunt at intel.com>
--snip--

> This API is no longer needed as it is superceded by the monitor/pause/scale

Nitpick.
monitor/pause/scale  => "PMD Power Managment modes monitor/pause/scale"


> Signed-off-by: David Hunt <david.hunt at intel.com>
Acked-By: Reshma Pattan <reshma.pattan at intel.com>