Remove the network cleanup

The inetnum range that i need when doing a whois lookup for an ip adress on ripe is cleaned by the cleanup method. 

I'm not sure why you would throw it away if there is just one contact specified? 

There might be a better way by setting a config flag somewhere that specifies if the network should be cleaned up or not? 
Let me know if that is preferred and where I should add/change it instead if you don't want to merge this.