This reverts commit 7b60964d87698572f2f13d8dfa966a85f169b698.
OE-Core defaults to no opengl in DISTRO_FEATURES and this would break
sato with the default DISTRO settings. Need to revisit as Sato moves
to gtk+3 but unbreak the builds for now as this change isn't essential.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>