OmemoManager: Do not try to renew signed pre key pairs while loading

When QXmppOmemoManager::load() is called, the client is not yet
connected to the server.
But the new device bundle must be published.
Thus, a renewal cannot be completed.

Author: melvo

src/omemo/QXmppOmemoManager.cpp

@@ -370,7 +370,6 @@ QXmppTask<bool> Manager::load()
             return;
         } else {
             d->signedPreKeyPairs = signedPreKeyPairs;
-            d->renewSignedPreKeyPairs();
         }
 
         const auto &preKeyPairs = omemoData.preKeyPairs;