Add continuous integration with read the doc instead of github actions

Closes pylint-dev#3850

.github/workflows/ci.yaml

@@ -32,8 +32,7 @@ jobs:
         id: generate-python-key
         run: >-
           echo "::set-output name=key::base-venv-${{ env.CACHE_VERSION }}-${{
-            hashFiles('pylint/__pkg_info__.py', 'requirements_test.txt',
-                      'requirements_test_min.txt', 'requirements_docs.txt') }}"
+            hashFiles('pylint/__pkg_info__.py', 'requirements_test.txt', 'requirements_test_min.txt') }}"
       - name: Restore Python virtual environment
         id: cache-venv
         uses: actions/cache@v2.1.4
@@ -51,7 +50,6 @@ jobs:
           . venv/bin/activate
           python -m pip install -U pip setuptools wheel
           pip install -U -r requirements_test.txt
-          pip install -U -r requirements_docs.txt
           pip install -e .
       - name: Generate pre-commit restore key
         id: generate-pre-commit-key
@@ -143,37 +141,6 @@ jobs:
           . venv/bin/activate
           pytest tests/ -k unittest_spelling
 
-  docs:
-    name: Test generating docs
-    runs-on: ubuntu-latest
-    needs: prepare-base
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v2.3.4
-      - name: Set up Python ${{ env.DEFAULT_PYTHON }}
-        id: python
-        uses: actions/setup-python@v2.2.1
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-      - name: Restore Python virtual environment
-        id: cache-venv
-        uses: actions/cache@v2.1.4
-        with:
-          path: venv
-          key: ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
-            needs.prepare-base.outputs.python-key }}
-      - name: Fail job if Python cache restore failed
-        if: steps.cache-venv.outputs.cache-hit != 'true'
-        run: |
-          echo "Failed to restore Python venv from cache"
-          exit 1
-      - name: Generate documentation
-        run: |
-          . venv/bin/activate
-          cd doc
-          sphinx-build -W -b html -d _build/doctrees . _build/html
-
-
   prepare-tests-linux:
     name: Prepare tests for Python ${{ matrix.python-version }} (Linux)
     runs-on: ubuntu-latest

ChangeLog

@@ -32,6 +32,10 @@ Release date: Undefined
 
   Closes #4277
 
+* Continuous integration with read the doc has been added.
+
+  Closes #3850
+
 
 What's New in Pylint 2.7.4?
 ===========================