remove .travis.yml (using github actions)
remove .travis.yml (using github actions)

Fixes: https://github.com/alsa-project/alsa-lib/pull/226
Signed-off-by: Jaroslav Kysela <72edd5e1a572f82f059ccbb83c92b74d6cb051ff@perex.cz>

alsa-project/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib