Update nix/ext/pgvector.nix

Co-authored-by: samrose <samuel@supabase.io>

Author: yvan-sraka

nix/ext/pgvector.nix

@@ -69,7 +69,6 @@ let
       meta = with lib; {
         description = "Open-source vector similarity search for Postgres";
         homepage = "https://github.com/${src.owner}/${src.repo}";
-        maintainers = [ "olirice" ];
         platforms = postgresql.meta.platforms;
         license = licenses.postgresql;
       };