bpf: Remove Lorenz Bauer from L7 BPF maintainers

I'm leaving my position at Cloudflare and therefore won't have the
necessary time and insight to maintain the sockmap code. It's in
more capable hands with Jakub anyways.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220222103925.25802-2-lmb@cloudflare.com