Drop tox -e packaging from CIs

.azure-pipelines/jobs/package.yml

@@ -24,9 +24,6 @@ jobs:
   - bash: nox -s generate_news -- --yes
     displayName: Generate NEWS.rst
 
-  - bash: tox -e packaging
-    displayName: Run Tox packaging
-
   - bash: python setup.py sdist bdist_wheel
     displayName: Create sdist and wheel
 

.github/workflows/python-linters.yml

@@ -20,7 +20,6 @@ jobs:
         env:
         - TOXENV: docs
         - TOXENV: lint
-        - TOXENV: packaging
     steps:
     - uses: actions/checkout@master
     - name: Set up Python ${{ matrix.env.PYTHON_VERSION || 3.7 }}

.travis.yml

@@ -17,7 +17,6 @@ jobs:
     - stage: primary
       env: TOXENV=docs
     - env: TOXENV=lint
-    - env: TOXENV=packaging
     # Latest CPython
     - env: GROUP=1
       python: 2.7

tools/travis/run.sh

@@ -2,7 +2,7 @@
 set -e
 
 # Short circuit test runs if there are no code changes involved.
-if ! [[ $TOXENV ~= ^(docs|lint|packaging)$ ]]; then
+if [[ $TOXENV != docs ]] || [[ $TOXENV != lint ]]; then
     if [[ "$TRAVIS_PULL_REQUEST" == "false" ]]
     then
         echo "This is not a PR -- will do a complete build."