integrations: remove hipchat as it's a deprecated product no longer working

docs/integrations/integrations.rst

@@ -16,7 +16,6 b' Type/Name Rhod'
 ================================    ==================    ========================================
 :ref:`integrations-webhook`         |RCCEshort|           Trigger events as `json` to a custom url
 :ref:`integrations-slack`           |RCCEshort|           Integrate with https://slack.com/
-:ref:`integrations-hipchat`         |RCCEshort|           Integrate with https://www.hipchat.com/
 :ref:`integrations-email`           |RCCEshort|           Send repo push commits by email
 :ref:`integrations-ci`              |RCCEshort|           Trigger Builds for Common CI Systems
 :ref:`integrations-rcextensions`    |RCCEshort|           Advanced low-level integration framework
@@ -50,7 +49,6 b' See pages specific to each type of integ'
 .. toctree::
 
    slack
-   hipchat
    redmine
    jira
    webhook