More Twitter cleanup from 404s

Author: kabutz

java-champions.yml

@@ -2238,7 +2238,6 @@ members:
     country:
       nomination: Switzerland
     social:
-      twitter: https://twitter.com/dlemmermann
       linkedin: https://www.linkedin.com/in/dlemmermann/
       bluesky: https://bsky.app/profile/dlemmermann.bsky.social
     avatar: img/avatars/dlemmermann.png
@@ -2247,7 +2246,6 @@ members:
     country:
       nomination: USA
     social:
-      twitter: https://twitter.com/mikelevin77
       linkedin: https://www.linkedin.com/in/zoobird/
     avatar: img/avatars/mikelevin77.png
   - name: Dr. Barry Levine
@@ -2732,7 +2730,6 @@ members:
       nomination: Poland
     city: Warsaw
     social:
-      twitter: https://twitter.com/tnurkiewicz
       mastodon: https://fosstodon.org/@nurkiewicz
       linkedin: https://www.linkedin.com/in/nurkiewicz
       github: https://github.com/nurkiewicz
@@ -2860,7 +2857,6 @@ members:
       nomination: Germany
     city: Neuss
     social:
-      twitter: https://twitter.com/SandraParsick
       mastodon: https://mastodon.social/@sparsick
       linkedin: https://www.linkedin.com/in/sandra-parsick/
     avatar: img/avatars/SandraParsick.png
@@ -3530,7 +3526,6 @@ members:
       nomination: Germany
     city: Aachen, North Rhine-Westphalia
     social:
-      twitter: https://twitter.com/rotnroll666
       mastodon: https://mastodon.social/@rotnroll666
       bluesky: https://bsky.app/profile/rotnroll666.bsky.social
       github: https://github.com/michael-simons