Simplify tox/CI

Author: dstansby

.github/workflows/test_and_deploy.yml

@@ -24,10 +24,10 @@ jobs:
         python-version: ['3.8', '3.9', '3.10']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -41,20 +41,14 @@ jobs:
           git clone --depth 1 https://github.com/pyvista/gl-ci-helpers.git
           powershell gl-ci-helpers/appveyor/install_opengl.ps1
 
-      # note: if you need dependencies from conda, considering using
-      # setup-miniconda: https://github.com/conda-incubator/setup-miniconda
-      # and
-      # tox-conda: https://github.com/tox-dev/tox-conda
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install setuptools tox tox-gh-actions
+          python -m pip install tox tox-gh-actions
 
       # this runs the platform-specific tests declared in tox.ini
       - name: Test with tox
         run: python -m tox
-        env:
-          PLATFORM: ${{ matrix.platform }}
 
       - name: Coverage
         uses: codecov/codecov-action@v2

tox.ini

@@ -1,31 +1,14 @@
 # For more information about tox, see https://tox.readthedocs.io/en/latest/
 [tox]
-envlist = py{38,39,310}-{linux,macos,windows}
-isolated_build=true
+envlist = py{38,39,310}
+isolated_build = true
 
 [gh-actions]
 python =
     3.8: py38
     3.9: py39
     3.10: py310
 
-[gh-actions:env]
-PLATFORM =
-    ubuntu-latest: linux
-    macos-latest: macos
-    windows-latest: windows
-
 [testenv]
-platform =
-    macos: darwin
-    linux: linux
-    windows: win32
-passenv =
-    CI
-    GITHUB_ACTIONS
-    DISPLAY XAUTHORITY
-    NUMPY_EXPERIMENTAL_ARRAY_FUNCTION
-    PYVISTA_OFF_SCREEN
-extras =
-    testing
-commands = pytest -v --color=yes --cov=napari_matplotlib --cov-report=xml
+extras = testing
+commands = python -m pytest -v --color=yes --cov=napari_matplotlib --cov-report=xml