Remove extension README file
Remove extension README file

miarcompanies/sdn-wise-contiki,sdnwiselab/sdn-wise-contiki,sdnwiselab/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,miarcompanies/sdn-wise-contiki,sdnwiselab/sdn-wise-contiki