This functionality was integrated into GTK+ 2.13 and we've dropped support for
anything before that.
[ YOCTO #2954 ]
(From OE-Core rev: 5bc4c0593997b046300a8f5b3f63c278aeb31d68)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>