fix: Problem joining when jicofo is not in brewery.

In this case the following error is observed:
org.jivesoftware.smackx.xdata.provider.DataFormProvider.parseField: Unknown form field child element {jabber:x:data}desc ignored
2024-09-10 17:14:49.523 WARNING: [1089] org.jivesoftware.smack.parsing.ExceptionThrowingCallbackWithHint.handleUnparsableStanza: Parsing exception "javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,2982]
Message: found: CHARACTERS, expected START_ELEMENT or END_ELEMENT" encountered. This exception will be re-thrown, leading to a disconnect. You can change this behavior by setting a different ParsingExceptionCallback using setParsingExceptionCallback(). More information an be found in AbstractXMPPConnection's javadoc.
2024-09-10 17:14:49.524 WARNING: [1096] org.jivesoftware.smack.AbstractXMPPConnection.callConnectionClosedOnErrorListener: Connection XMPPTCPConnection[jigasi@auth.mydomain.com/jitsi-3f1ep5l] (10) closed with error
java.io.IOException: org.jivesoftware.smack.xml.XmlPullParserException: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,2982]
Message: found: CHARACTERS, expected START_ELEMENT or END_ELEMENT

src/main/java/org/jitsi/jigasi/Main.java

@@ -152,7 +152,6 @@ public class Main
             "org.jivesoftware.smackx.si",
             "org.jivesoftware.smackx.vcardtemp",
             "org.jivesoftware.smackx.xhtmlim",
-            "org.jivesoftware.smackx.xdata",
             "org.jivesoftware.smackx.eme",
             "org.jivesoftware.smackx.iqprivate",
             "org.jivesoftware.smackx.bookmarks",