[Fedora-spins] I removed member list on wiki page

[Bruno Wolff III]

The member list on the Spins SIG wiki page didn't really reflect the active
membership of the spins group. At this time having the list there didn't
seem to be of much benefit.

People should use the mailing list or attend meetings to reach members.
Releng needs to know who to work with for releases (the Wrangler).

If the team starts becoming more functional in the future, it might make
sense to list some people that might be useful to contact individually.