Previous commits have meant that PolicyKit isn't used by default anymore, so
remove this now that it's been integrated into meta-gnome.
Rationales for this move inludes that PolicyKit isn't "core" for embedded
systems, and future versions require the SpiderMonkey JavaScript runtime.
(From OE-Core rev: 8c9fad86d8bd86f13d61a1a5cd65d12b16a9e0de)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>