travis: Remove support for Travis CI.

All CI jobs are covered by GitHub Actions now.

What happened to Travis CI:
https://mail.openvswitch.org/pipermail/ovs-dev/2020-November/377773.html

Acked-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

Documentation/internals/contributing/submitting-patches.rst

@@ -68,10 +68,9 @@ Testing is also important:
   feature.  A bug fix patch should preferably add a test that would
   fail if the bug recurs.
 
-If you are using GitHub, then you may utilize the travis-ci.org and the GitHub
-Actions CI build systems.  They will run some of the above tests automatically
-when you push changes to your repository.  See the "Continuous Integration with
-Travis-CI" in :doc:`/topics/testing` for details on how to set it up.
+If you are using GitHub, then you may utilize the GitHub Actions CI build
+system.  It will run some of the above tests automatically when you push
+changes to your repository.
 
 Email Subject
 -------------

Documentation/topics/testing.rst

@@ -372,45 +372,17 @@ You should invoke scan-view to view analysis results. The last line of output
 from ``clang-analyze`` will list the command (containing results directory)
 that you should invoke to view the results on a browser.
 
-Continuous Integration with Travis CI
--------------------------------------
+Continuous Integration with GitHub Actions
+------------------------------------------
 
-A .travis.yml file is provided to automatically build Open vSwitch with various
-build configurations and run the testsuite using Travis CI. Builds will be
-performed with gcc, sparse and clang with the -Werror compiler flag included,
-therefore the build will fail if a new warning has been introduced.
+A ``.github/workflows/*.yml`` files provided to automatically build
+Open vSwitch with various build configurations and run the testsuite using
+GitHub Actions. Builds will be performed with gcc, sparse and clang with the
+-Werror compiler flag included, therefore the build will fail if a new warning
+has been introduced.
 
 The CI build is triggered via git push (regardless of the specific branch) or
-pull request against any Open vSwitch GitHub repository that is linked to
-travis-ci.
-
-Instructions to setup travis-ci for your GitHub repository:
-
-1. Go to https://travis-ci.org/ and sign in using your GitHub ID.
-2. Go to the "Repositories" tab and enable the ovs repository. You may disable
-   builds for pushes or pull requests.
-3. In order to avoid forks sending build failures to the upstream mailing list,
-   the notification email recipient is encrypted. If you want to receive email
-   notification for build failures, replace the the encrypted string:
-
-   1. Install the travis-ci CLI (Requires ruby >=2.0): gem install travis
-   2. In your Open vSwitch repository: travis encrypt mylist@mydomain.org
-   3. Add/replace the notifications section in .travis.yml and fill in the
-      secure string as returned by travis encrypt::
-
-          notifications:
-            email:
-              recipients:
-                - secure: "....."
-
-  .. note::
-    You may remove/omit the notifications section to fall back to default
-    notification behaviour which is to send an email directly to the author and
-    committer of the failing commit. Note that the email is only sent if the
-    author/committer have commit rights for the particular GitHub repository.
-
-4. Pushing a commit to the repository which breaks the build or the
-   testsuite will now trigger a email sent to mylist@mydomain.org
+pull request against any Open vSwitch GitHub repository.
 
 vsperf
 ------

Makefile.am

@@ -82,7 +82,6 @@ EXTRA_DIST = \
 	.ci/osx-prepare.sh \
 	.cirrus.yml \
 	.github/workflows/build-and-test.yml \
-	.travis.yml \
 	appveyor.yml \
 	boot.sh \
 	poc/builders/Vagrantfile \

README.rst

@@ -8,8 +8,6 @@ Open vSwitch
 
 .. image:: https://github.com/openvswitch/ovs/workflows/Build%20and%20Test/badge.svg
     :target: https://github.com/openvswitch/ovs/actions
-.. image:: https://travis-ci.org/openvswitch/ovs.png
-    :target: https://travis-ci.org/openvswitch/ovs
 .. image:: https://ci.appveyor.com/api/projects/status/github/openvswitch/ovs?branch=master&svg=true&retina=true
     :target: https://ci.appveyor.com/project/blp/ovs/history