The previous commit, 'wic: Remove 3rdparty/urlgrabber' didn't actually
remove all references to urlgrabber - this does however.
(From OE-Core rev: b4367af770611174d9de82c63c697d4347e30dcf)
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>