Ignore hidden files

conda/clean-betas.py

@@ -68,6 +68,7 @@ def main(scandir, dry_run):
   for (path, dirnames, filenames) in os.walk(sys.argv[1], followlinks=False):
 
     for f in filenames:
+      if f.startswith('.'): continue
       if f.startswith('repodata.json'): continue
       m = package_regex.match(f)
       if m is None: