Remove unused .travis.yml

This project is now maintained in the OpenStack project which uses
zuul to run CI tests.

Change-Id: I25757ffbce1fd7586f4c5ddec8d6326fb1868d88
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.travis.yml

@@ -1,43 +0,0 @@
-language: python
-
-matrix:
-  include:
-    - python: 3.6
-      env: TOX_ENV=pycodestyle
-    - python: 3.6
-      env: TOX_ENV=py36
-    - python: 3.6
-      env: TOX_ENV=autopep8
-
-    - python: 2.7
-      env: TOX_ENV=pycodestyle
-    - python: 2.7
-      env: TOX_ENV=py27
-
-    - python: 3.4
-      env: TOX_ENV=py34
-
-    - python: 3.5
-      env: TOX_ENV=py35
-
-    - python: 3.7-dev
-      env: TOX_ENV=py37
-
-# This is disabled because of trouble running on travis CI.
-#    - python: pypy
-#      env: TOX_ENV=pypy
-
-services:
-  - docker
-
-sudo: required  # Required to enable Docker service
-
-install:
-  - pip install tox coveralls
-  - bash os_ken/tests/integrated/common/install_docker_test_pkg_for_travis.sh
-
-script:
-  - NOSE_VERBOSE=0 tox -e $TOX_ENV
-
-after_success:
-  - coveralls