remove travis.yml

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

.travis.yml

@@ -1,25 +0,0 @@
-sudo: false
-dist: trusty
-language: python
-python:
-  - "3.6"
-  - "2.7"
-env:
-  global:
-    - PYPI_VENDOR_DIR='./tests/pypi/'
-    - GIT_ASK_YESNO='false'
-    - PYTHONIOENCODING='utf-8'
-  matrix:
-    - TEST_SUITE='not install'
-    - TEST_SUITE='install'
-      PYTEST_ADDOPTS='--cache-clear'
-
-install:
-  - "pip install --upgrade pip"
-  - "pip install -e . --upgrade --upgrade-strategy=only-if-needed"
-  - "pipenv install --dev"
-  - 'pip install -e "$(pwd)" --upgrade'
-  - 'pipenv install --system --dev'
-
-script:
-  - 'pipenv run time pytest -v -n 4 -m "$TEST_SUITE" tests'