[plt-scheme] deleting users

Ever since Hotmail, Yahoo, etc began imposing space limits, running
this list has become something of a pain.  The following users seem to
regularly be out of space (maybe they've even abandoned these
addresses entirely).  If you know them and can contact them through an
alternate address, please tell them to resubscribe -- I'm removing
them from the list for now.

 <gregory_lampshire at hotmail.com> ... transport smtp: 552 Requested action not taken: exceeded storage allocation
 <immanuel_litzroth at hotmail.com> ... transport smtp: 552 Requested action not taken: exceeded storage allocation
 <leon_heller at hotmail.com> ... transport smtp: 552 Requested action not taken: exceeded storage allocation
 <manigal at hotmail.com> ... transport smtp: 552 Requested action not taken: exceeded storage allocation
 <mathieu_paradis at hotmail.com> ... transport smtp: 552 Requested action not taken: exceeded storage allocation

Thanks,
Shriram