[OE-core] [PATCH] manpages.bbclass: avoid QA warning when "manpages" feature not supported

[Alexander Kanavin]

On 05/15/2017 11:32 AM, Patrick Ohly wrote:
> Activating API documentation with:
>   INHERIT += "manpages"
>   DISTRO_FEATURES_append = " api-documentation"

You do not need to add the first line at all, why are you doing it?

manpages is inherited on a per-recipe basis when the recipe itself 
supports the manpages PACKAGECONFIG. This patch is unnecessary.

Alex