Remove duplicate Austin on Rails in November

Author: marcoroth

_data/meetups.yml

@@ -2098,13 +2098,6 @@
   end_time: 11:00:00 PDT
   url: https://www.meetup.com/ocruby/events/sdczltygcpbpb
 
-- name: Austin on Rails - Placeholder
-  location: Austin, TX
-  date: 2024-11-12
-  start_time: 18:30:00 CDT
-  end_time: 20:30:00 CDT
-  url: https://www.meetup.com/austin-on-rails/events/298132894
-
 - name: Austin.rb - Placeholder November 2024
   location: Austin, TX
   date: 2024-11-12