Remove logging about removing dir with NOCLOBBER

[peterjc]

Currently get:

INFO: command-line: ...
INFO: Input directory: interesting_serratia
INFO: Removing directory interesting_serratia_cmp and everything below it
WARNING: NOCLOBBER: not actually deleting directory
...

With this change get:

INFO: command-line: ...
INFO: Input directory: interesting_serratia
WARNING: NOCLOBBER: not actually deleting directory interesting_serratia_cmp
...

This removes the scary message ;)

There is scope for further simplification here when (re)creating the directories...

[codecov-io]

Codecov Report

Merging #79 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #79   +/-   ##
=======================================
  Coverage   69.84%   69.84%           
=======================================
  Files          11       11           
  Lines         756      756           
=======================================
  Hits          528      528           
  Misses        228      228

[widdowquinn]

Thanks Peter.