linux-yocto_4.8.bbappend: Drop this

linux-yocto_4.8.bbappend: Drop this

We move to a version of poky that uses v4.8.25 and that release includes
the fix for CVE-2017-1000364 so we do not need to patch it manually.

Bug-AGL: SPEC-1017
Change-Id: Ie57f0d628ac2b817d7383e2a0a5a3383d6d06094
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/11663
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Scott Murray <scott.murray@konsulko.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>