double reqs.txt in rtd.yml

.readthedocs.yml

@@ -13,8 +13,7 @@ sphinx:
 python:
    version: 3.7
    install:
+      - requirements: docs/requirements.txt
       - requirements: requirements.txt
       - method: pip
         path: .
-        extra_requirements:
-            - docs

docs/conf.py

@@ -48,7 +48,7 @@ templates_path = []
 exclude_patterns = ['_build', '**.ipynb_checkpoints']
 
 # Mock language_check to stop issues with Sphinx not loading it
-autodoc_mock_imports = []
+autodoc_mock_imports = open('../requirements.txt').readlines()
 
 # -- Options for HTML output -------------------------------------------------