Removing qtwebkit to be replaced by qtwebengine

Bug-AGL: SPEC-1159

Change-Id: Ieecc7cc51015dd0b7ce689e90f43fcd17b3eb62d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/12289
Reviewed-by: José Bollo <jose.bollo@iot.bzh>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Reviewed-by: ronan Le Martret <ronan.lemartret@iot.bzh>
Reviewed-by: Stéphane Desneux <stephane.desneux@iot.bzh>