Remove travis icon
Remove travis icon

The builds often 'fail'. While these failures are not true failures
(they mainly have to do with timing, libcouchbase dependencies and so
on) it's not very useful to have a blaring red icon there all the time.

Change-Id: I465e7cc04f92df4b4c91190f0c0283d119ca13e8
Reviewed-on: http://review.couchbase.org/79033
Reviewed-by: Subhashni Balakrishnan <7129c8e37b832c7bd362ff375532d24b98ef5162@gmail.com>
Tested-by: Mike Goldsmith <c43a3c67d7a1203c37ce25b098df0254011e1ce6@gmail.com>

couchbase/couchbase-python-client,couchbase/couchbase-python-client