Revert "Try reverting the only changes to build_doc since the break"

This reverts commit d02a85b.

.github/workflows/ci.yml

@@ -207,19 +207,8 @@ jobs:
           install_extras: plotting
           wheelhouse: false
 
-      - name: Install OpenGL
-        run: |
-          Set-StrictMode -Version Latest
-          $ErrorActionPreference = "Stop"
-          $PSDefaultParameterValues['*:ErrorAction']='Stop'
-          git clone --depth 1 https://github.com/pyvista/gl-ci-helpers.git
-          powershell gl-ci-helpers/appveyor/install_opengl.ps1
-
-      - name: Install test offscreen rendering
-        run: |
-          .ci/setup_headless_display.sh
-          pip install -r .ci/requirements_test_xvfb.txt
-          python .ci/display_test.py
+      - name: "Setup headless display"
+        uses: pyvista/setup-headless-display-action@v1
 
       - name: "Setup Graphviz"
         uses: ts-graphviz/setup-graphviz@v1