recipes-graphics/mesa: Drop older mesa patch for agl-kvm

recipes-graphics/mesa: Drop older mesa patch for agl-kvm

As this seems no longer necessary, drop the patch entirely.

Once flutter-auto starts we no longer see graphical artefacts but this
requires further changes into flutter-auto as discussed in SPEC-5207.

Bug-AGL: SPEC-5234
Change-Id: I6d76662b293ce2abd234d42a03a954066794c7e1
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/30220
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Naoto YAMAGUCHI <naoto.yamaguchi@aisin.co.jp>
Reviewed-by: Scott Murray <scott.murray@konsulko.com>