Fix warning for pessimistic move

include/mtxclient/crypto/client.hpp

@@ -93,7 +93,7 @@ unpickle(const std::string &pickled, const std::string &key)
         if (ret == -1)
                 throw olm_exception("unpickle", object.get());
 
-        return std::move(object);
+        return object;
 }
 
 using OlmSessionPtr           = std::unique_ptr<OlmSession, OlmDeleter>;

include/mtxclient/http/client.hpp

@@ -528,7 +528,7 @@ mtx::http::Client::create_session(HeadersCallback<Response> callback)
                   boost::signals2::signal<void()>::slot_type(&Session::terminate, session.get())
                     .track_foreign(session));
 
-        return std::move(session);
+        return session;
 }
 
 template<class Payload, mtx::events::EventType Event>