Fix warning

indra/newview/llimview.cpp

@@ -2116,8 +2116,6 @@ void LLOutgoingCallDialog::show(const LLSD& key)
 
 	std::string callee_name = mPayload["session_name"].asString();
 
-	LLUUID session_id = mPayload["session_id"].asUUID();
-
 	if (callee_name == "anonymous") // obsolete? Likely was part of avaline support
 	{
 		callee_name = getString("anonymous");