MUC: Remove <{muc}x> tags in some errors Including the payload of the stanza that caused the error is optional and we're generally not doing it anywhere else.

author: Kim Alvefur <zash@zash.se>
date: Wed, 08 Dec 2021 21:55:25 +0100
parent: 10759:817f1d6b499e
--- a/spec/scansion/muc_show_offline.scs	Wed Dec 08 21:06:16 2021 +0100
+++ b/spec/scansion/muc_show_offline.scs	Wed Dec 08 21:55:25 2021 +0100
@@ -185,7 +185,6 @@
 		<error type='cancel' by='room@conference.localhost'>
 			<conflict xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
 		</error>
-		<x xmlns='http://jabber.org/protocol/muc'/>
 	</presence>
 
 # In a heated moment, Juliet unregisters from the room
@@ -296,7 +295,6 @@
 		<error type='cancel' by='room@conference.localhost'>
 			<conflict xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
 		</error>
-		<x xmlns='http://jabber.org/protocol/muc'/>
 	</presence>
 
 # Juliet, however, quietly joins the room with success