remove unecessary comment (pep8)

inventory_provider/juniper.py

@@ -403,7 +403,6 @@ def snmp_community_string(netconf_config):
 
 def netconf_changed_timestamp(netconf_config):
     '''
-    <configuration changed-seconds="1549049195" changed-localtime="2019-02-01 19:26:35 UTC">
     return the last change timestamp published by the config document
     :param netconf_config: netconf lxml etree document
     :return: an epoch timestamp (integer number of seconds) or None