x-load: Drop .bbappend, recipe was dropped

* based on comment we didn't have it working yet anyway

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
udev-extraconf: Rename .bbappends to match new version from oe-core

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
xserver-xorg: Rename .bbappend to match with new version from oe-core

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>