I have run into a jam here.  My fs that I am writing the backups to is full.  I have exceed the DfMaxUsagePct that I set and can not go any higher on that.  I have a couple of client's backups that I could remove. 

Can I simply go into the data/pc and rm the clients no longer needed to free up space? 
I went thru some of the docs and I didn't find anything that pointed me towards client removal.