plugin XEP-0298: remove the obsolete session-init trigger:

- Conferences are not using XEP-0298 anymore, following the Jingle A/V Conferences
  protoXEP update.
- fix XEP-0166 dependency

libervia/backend/plugins/plugin_xep_0298.py

@@ -39,7 +39,7 @@ PLUGIN_INFO = {
     C.PI_TYPE: "XEP",
     C.PI_MODES: C.PLUG_MODE_BOTH,
     C.PI_PROTOCOLS: [],
-    C.PI_DEPENDENCIES: ["XEP-0167"],
+    C.PI_DEPENDENCIES: ["XEP-0166"],
     C.PI_MAIN: "XEP_0298",
     C.PI_HANDLER: "yes",
     C.PI_DESCRIPTION: _(
@@ -59,36 +59,11 @@ class XEP_0298:
         log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
         self.host = host
         self._j: XEP_0166 = host.plugins["XEP-0166"]
-        host.trigger.add(
-            "XEP-0167_jingle_session_init", self._jingle_session_init_trigger
-        )
         host.trigger.add("XEP-0167_jingle_handler", self._jingle_handler_trigger)
 
     def get_handler(self, client):
         return CoinHandler(self)
 
-    def _jingle_session_init_trigger(
-        self,
-        client: SatXMPPEntity,
-        session: dict,
-        content_name: str,
-        media: str,
-        media_data: dict,
-        desc_elt: domish.Element,
-    ) -> None:
-        """Check for the presence of "user" metadata, and add relevant elements."""
-        if client.profile == "conferences":
-            if content_name != next(iter(session["contents"].keys())):
-                # We only apply metadata for the first content, as it is global.
-                return
-            try:
-                user = session["metadata"]["user"]
-            except KeyError:
-                return
-            jingle_elt = session["jingle_elt"]
-            conference_info_elt = self.add_conference_info(jingle_elt, True)
-            self.add_user(conference_info_elt, user)
-
     async def _jingle_handler_trigger(
         self,
         client: SatXMPPEntity,