Drop all kernel 6.6 patches, hacks, backports and configuration support,
and remove the CONFIG_LINUX_6_6 guarded conditional in filogic.mk.
Signed-off-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Link: https://github.com/openwrt/openwrt/pull/20943
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>