[TASK] Remove irc notification from travis.yml

irc is unused.

Resolves: #84347
Releases: master, 8.7
Change-Id: I6d52ca238d698d21a446da624438ac46d099b93b
Reviewed-on: https://review.typo3.org/56228
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

.travis.yml

@@ -23,12 +23,6 @@ cache:
     - $HOME/.sonar/cache
 
 notifications:
-  irc:
-    channels:
-      - "irc.freenode.net#typo3-cms"
-    on_success: change
-    on_failure: always
-    use_notice: true
   slack:
     rooms:
       secure: nHWVTPyG3CQWIcYA1LASS11dD0/NBcmrAyr3xxQW0XYtH47ZUKRlEtxrVLuL7ptciNwMbfZgsiRQ1QGWDerHUlBkg0iwRxpUZgeylzWaiXsHFVAp2IBfEX54KrWeYm9gewIBDDtnp+sLgpXGgmpIs2bAGkZe5129UsUExoWh0+g=