CI: Stop using Travis CI

Remove .travis.yml.

diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644 (file)
index 54d630d..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-os: linux
-
-dist: xenial
-
-language: python
-
-python:
-  - "2.7"
-
-cache: pip
-
-matrix:
-  include:
-  - python: "2.7"
-    env: TOXENV=py27
-  - python: "3.4"
-    env: TOXENV=py34
-  - python: "3.5"
-    env: TOXENV=py35
-  - python: "3.6"
-    env: TOXENV=py36
-  - python: "3.7"
-    env: TOXENV=py37
-  - python: "3.8"
-    env: TOXENV=py38
-  - python: "3.9"
-    env: TOXENV=py39
-  - python: "pypy"
-    env: TOXENV=pypy
-
-install:
-  - travis_retry pip install --upgrade "pip<21" "setuptools<44" tox ppu
-
-script:
-  - tox
-
-before_cache:
-  - scripts/remove-old-files.py -o 180 ~/.cache/pip