net/sched: Retire tcindex classifier

stable inclusion
from stable-v4.19.276
commit 01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6UYBU
CVE: CVE-2023-1829

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b



--------------------------------

commit 8c710f75 upstream.

The tcindex classifier has served us well for about a quarter of a century
but has not been getting much TLC due to lack of known users. Most recently
it has become easy prey to syzkaller. For this reason, we are retiring it.

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>