Remove unused $nodes_cert_{dir,name} variables
e55f49ba7e304e5927ebd7a363e4e62a027d54d3 removed the use of these butkept the definition.
Remove unused $nodes_cert_{dir,name} variables
e55f49ba7e304e5927ebd7a363e4e62a027d54d3 removed the use of these but
kept the definition.