Do not use a double source of truth for docs dependencies. extra_requ…

…ire is great, but unfortunately we can't use it on readthedocs builds

.github/workflows/push.yml

@@ -244,7 +244,9 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Requirements
-      run: python3 -m pip install .[docs]
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r doc/requirements.txt
     - name: Check links
       run: sphinx-build -b linkcheck doc/source doc/build
     - name: Generate documentation

setup.py

@@ -95,9 +95,6 @@ def recursively_include(results, directory, patterns):
       url='https://github.com/kivy/python-for-android',
       license='MIT',
       install_requires=install_reqs,
-      extras_require={
-          "docs": ["sphinx", "sphinx-rtd-theme"],
-      },
       entry_points={
           'console_scripts': [
               'python-for-android = pythonforandroid.entrypoints:main',