Remove Framebuffer support ('services: xvfb') in TravisCI
Remove Framebuffer support ('services: xvfb') in TravisCI

Trying to fix issue:

INFO] Running "qunit:all" (qunit) task
[INFO] Testing http://localhost:38887/test/js/all.html?1.12.4 .Fatal error: Execution context is not available in detached frame "about:blank" (are you trying to evaluate?)

There is no FB in Github Actions and it works well.

Signed-off-by: Martin Tzvetanov Grigorov <467ed6115092226a07ff6116d483984b94cf27b9@apache.org>

apache/wicket,apache/wicket,mosoft521/wicket,apache/wicket,mosoft521/wicket,apache/wicket,mosoft521/wicket,mosoft521/wicket,apache/wicket,mosoft521/wicket