tidy doc ci

Author: keurfonluu

.github/workflows/doc.yml

@@ -10,24 +10,11 @@ jobs:
   docs:
 
     runs-on: ubuntu-latest
-    env:
-      PYVISTA_OFF_SCREEN: 'True'
-      ALLOW_PLOTTING: true
-      SHELLOPTS: 'errexit:pipefail'
-
     steps:
       - uses: nschloe/action-cached-lfs-checkout@v1
       - uses: actions/setup-python@v4
         with:
             python-version: '3.9'
-      - name: Install OSMesa VTK
-        run: |
-          sudo apt update
-          sudo apt install libosmesa6-dev libgl1-mesa-dev retry --option="APT::Acquire::Retries=3"
-          pip install https://github.com/pyvista/pyvista-wheels/raw/main/vtk-osmesa-9.1.0-cp39-cp39-linux_x86_64.whl
-      - name: Install libGLU for pygmsh
-        run: |
-          sudo apt install libglu1
       - name: Install toughio
         run: |
           git lfs pull