ovsconf 2025: Drop the early bird language.

The offer expired, so no need to mention it anymore.

Signed-off-by: Aaron Conole <aconole@redhat.com>

Author: apconole

support/ovscon2025/index.html

@@ -24,9 +24,7 @@ <h2>How to attend</h2>
 <p>
     Registration will be required to attend.  See the event brite page
     to <a href="https://www.eventbrite.com/e/open-vswitch-and-ovn-2025-fall-conference-tickets-1542483964059">register</a>.
-    To receive a 20% discount on your in-person ticket, please enter promotion
-    code <b>EARLY-BIRD-ATTENDEE-2025</b> during registration.  This offer is valid
-    until October 8th.  We offer complementary registration to speakers, students,
+    We offer complementary registration to speakers, students,
     academics, and anyone for whom the registration fee is burdensome.
     Please contact us if you need any help obtaining a complementary
     registration.