Close registration (#480)

Author: jaclark5

pages/ugm2025.md

@@ -37,11 +37,7 @@ You can expect:
 
 ## Registration
 
-~~Register by **July 15, 2025**~~ Registration is continuing on a rolling basis until participation limits are reached, at which point this page will be updated.
-
-<a href="https://forms.gle/bPvVTMpzBkyCRtNA7" target="_blank" style="background:#FF9200;padding:10px;margin:10px 0px;text-align:center;text-decoration:none;font-size:16pt;color:#000000;display:inline-block;border-radius:3px">Register</a>
-
-For in-person attendance we will ask for a $100 registration fee when we confirm your registration with you after the registration deadline, but you can register without paying the fee immediately.
+~~Register by **July 15, 2025**~~ Registration is now full! Thank you for your consideration in joining us, we hope to see you next year.
 
 Online attendance is free.