Delete .travis.yml

It was always a stub, and we're definitely not using it.

Closes: #544
Approved by: jlebon

.travis.yml

@@ -1,25 +0,0 @@
-# We're just using a "stubbed out" Travis right now so we can
-# use Homu <https://github.com/barosl/homu> to auto-squash
-# etc.
-#
-# In the future we'll hook up better tests.
-language: c
-dist: trusty
-addons:
-    apt:
-    packages:
-      - automake
-      - autotools-dev
-script:
-  - env NOCONFIGURE=1 ./autogen.sh
-
-notifications:
-  # This is Colin's personal Homu instance.  We will
-  # also work on productizing this in Project Atomic.
-  webhooks: http://escher.verbum.org:54856/travis
-  email: false
-
-branches:
-  only:
-    - auto
-