cleanup - remove unnecessary calls to get_cpu_freq_GHz
The one in lte-enb.c disrupts the realtime. Using a B200mini with 20MHz bandwidth leads to the UE unable to connect for it seesms like the UL and DL are not properly time synched because of this sleep of one second that happens after the USRP streaming has started. We see some random access attempts but the decoded preamble is wrong. This may be dependant on the setup. I had sporadic errors with a B210, where sometimes the UE could connect and sometimes not.