docs: Removed reference of Cisco eStreamer for Splunk app from ASA/FTD doc (#2629)

* docs: Removed reference of Cisco eStreamer for Splunk app

Author: cwadhwani-splunk

docs/sources/vendor/Cisco/cisco_asa.md

@@ -11,7 +11,6 @@
 | Ref            | Link                                                                                                    |
 |----------------|---------------------------------------------------------------------------------------------------------|
 | Splunk Add-on for ASA (No long supports FWSM and PIX) | <https://splunkbase.splunk.com/app/1620/>                                                          |
-| Cisco eStreamer for Splunk | <https://splunkbase.splunk.com/app/1629/>                                                     |
 | Product Manual | <https://www.cisco.com/c/en/us/support/docs/security/pix-500-series-security-appliances/63884-config-asa-00.html> |
 
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