Revert "Add arg to clean v3bw files in tests"

This reverts commit edec4a38bb432f5cd697b7ec44b5e6a477b4074e.
To do not modify existing cleaning code for result files.

tests/unit/conftest.py

@@ -119,7 +119,7 @@ def sbwshome_only_datadir(sbwshome_empty):
 def args(sbwshome_empty, parser):
     """Args with sbws home in the tests tmp dir."""
     args = _PseudoArguments(directory=sbwshome_empty, output=sbwshome_empty,
-                            scale=False, log_level='debug', v3bw=False)
+                            scale=False, log_level='debug')
     return args