Remove unnecessary session command logging

All executed session commands were logged in the RWSplitSession
destructor. This is not really necessary and shouldn't have been placed
there in the first place.

server/modules/routing/readwritesplit/rwsplitsession.cc

@@ -97,22 +97,6 @@ void RWSplitSession::close()
 {
     close_all_connections(m_backends);
     m_current_query.reset();
-
-    if (MXS_LOG_PRIORITY_IS_ENABLED(LOG_INFO) &&
-        m_sescmd_list.size())
-    {
-        std::string sescmdstr;
-
-        for (mxs::SessionCommandList::iterator it = m_sescmd_list.begin();
-             it != m_sescmd_list.end(); it++)
-        {
-            mxs::SSessionCommand& scmd = *it;
-            sescmdstr += scmd->to_string();
-            sescmdstr += "\n";
-        }
-
-        MXS_INFO("Executed session commands:\n%s", sescmdstr.c_str());
-    }
 }
 
 int32_t RWSplitSession::routeQuery(GWBUF* querybuf)