erp5diff: remove debugging 'print' that breaks some commands like '--name'

setup.py

@@ -8,7 +8,7 @@ api_version = re.search(r'\s*__version__\s*=\s*(\S+)',
                         open('ERP5Diff.py').read()).group(1).strip()
 revision = 0
 version = '%s.%s' % (api_version.replace("'", ''), revision)
-print version
+
 setup(name="erp5diff",
       version=version,
       description="XUpdate Generator for ERP5",