MAINTAINERS: Remove Wedson as Rust maintainer

I am retiring from the project, so removing myself from MAINTAINERS as I won't
have time to dedicate to it.

Signed-off-by: Wedson Almeida Filho <wedsonaf@gmail.com>
Link: https://lore.kernel.org/r/20240828211117.9422-2-wedsonaf@gmail.com


Signed-off-by: Miguel Ojeda <ojeda@kernel.org>