insserv.bbclass was removed from oe-core:
commit e6bb5dbb62257a7de730ea9085dfd89520f3e47d
Author: Richard Purdie <richard.purdie@linuxfoundation.org>
Date: Sun May 10 12:30:49 2015 +0100
insserv: Remove
(From yocto-docs rev: 383fbedb057ffb28dddf201995ae622ce7b7eff5)
Signed-off-by: Maxin John <maxin.john@gmail.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>