Fix "Permission denied: '/home/travis/.cache/" errors from travis build [1]. Change owner https://docs.travis-ci.com/user/caching/#caches-and-read-permissions and remove old log in the *before_caching* phase: https://docs.travis-ci.com/user/caching/#before_cache-phase About pip cache see: https://docs.travis-ci.com/user/caching/#pip-cache Signed-off-by: Markus Heiser <markus.heiser@darmarit.de> [1] https://travis-ci.org/github/asciimoo/searx/jobs/669664131#L220