Delete vertx-auth-webauthn.

Motivation:

vertx-auth-webauthn4j replaces vertx-auth-webauthn in Vert.x 5 with the same API. vertx-auth-webauthn4j will be back-ported to Vert.x 4.5.x to provide a migration path from Vert.x 4 to Vert.x 5

Author: vietj

pom.xml

@@ -33,7 +33,6 @@
     <module>vertx-auth-oauth2</module>
     <module>vertx-auth-htdigest</module>
     <module>vertx-auth-htpasswd</module>
-    <module>vertx-auth-webauthn</module>
     <module>vertx-auth-webauthn4j</module>
     <module>vertx-auth-properties</module>
     <module>vertx-auth-sql-client</module>
@@ -135,4 +134,4 @@
     </plugins>
   </build>
 
-</project>
+</project>