[TASK] Drop travis-ci badge from README.md

Change-Id: Ibb646663a899d183f7a55c829ab2acea70838a0c
Resolves: #93128
Related: #93084
Releases: master, 10.4, 9.5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67216


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

README.md

 TYPO3 CMS
 =========
 
-[![Build Status](https://travis-ci.org/TYPO3/TYPO3.CMS.svg?branch=master)](https://travis-ci.org/TYPO3/TYPO3.CMS)
-
 TYPO3 is an open source PHP based web content management system released
 under the GNU GPL. TYPO3 is copyright (c) 1999-2020 by Kasper Skaarhoj.