Remove Travis mentions following Github Actions switch. (#444)

README.rst

@@ -13,8 +13,8 @@ LICENSE
 New BSD. See `License File <https://github.com/dask/dask-jobqueue/blob/master/LICENSE.txt>`__.
 
 .. _documentation: https://jobqueue.dask.org/en/latest/
-.. |Build Status| image:: https://travis-ci.org/dask/dask-jobqueue.svg?branch=master
-   :target: https://travis-ci.org/dask/dask-jobqueue
+.. |Build Status| image:: https://github.com/dask/dask-jobqueue/workflows/CI/badge.svg
+   :target: https://github.com/dask/dask-jobqueue/actions
 .. |Doc Status| image:: https://readthedocs.org/projects/dask-jobqueue/badge/?version=latest
    :target: https://jobqueue.dask.org/en/latest/
    :alt: Documentation Status

ci/sge/docker-compose.yml

@@ -8,7 +8,7 @@ services:
       context: .
       target: master
       args:
-        PYTHON_VERSION: ${TRAVIS_PYTHON_VERSION:-3.6}
+        PYTHON_VERSION: 3.6
     container_name: sge_master
     hostname: sge_master
     #network_mode: host
@@ -22,7 +22,7 @@ services:
       context: .
       target: slave
       args:
-        PYTHON_VERSION: ${TRAVIS_PYTHON_VERSION:-3.6}
+        PYTHON_VERSION: 3.6
     container_name: slave_one
     hostname: slave_one
     #network_mode: host
@@ -40,7 +40,7 @@ services:
       context: .
       target: slave
       args:
-        PYTHON_VERSION: ${TRAVIS_PYTHON_VERSION:-3.6}
+        PYTHON_VERSION: 3.6
     container_name: slave_two
     hostname: slave_two
     #network_mode: host

docs/source/develop.rst

@@ -46,8 +46,8 @@ Some tests require to have a fully functional job queue cluster running, this
 is done through Docker_ and `Docker compose`_ tools. You must thus have them
 installed on your system following their docs.
 
-You can then use the same commands as Travis CI does for your local testing,
-for example with pbs::
+You can then use the same commands as the CI for running the tests locally.
+For example for PBS you can run::
 
    source ci/pbs.sh
    jobqueue_before_install