Merge pull request #15107 from edx/rraposa/docs-cleanup

README.rst

cms/envs/common.py

cms/envs/help_tokens.ini

docs/README.rst

docs/en_us/Makefile

docs/en_us/architecture/locator_ubiquity.graphml

docs/en_us/architecture/locator_ubiquity.jpg

docs/en_us/architecture/presplit.graphml

docs/en_us/architecture/presplit.jpg

docs/en_us/architecture/studio mapping.graphml

docs/en_us/architecture/studio mapping.jpg

docs/en_us/developers/README.rst

docs/en_us/enrollment_api/Makefile

docs/en_us/enrollment_api/__init__.py

docs/en_us/enrollment_api/requirements.txt

docs/en_us/enrollment_api/source/__init__.py

docs/en_us/enrollment_api/source/_static/homepage-bg.jpg

docs/en_us/enrollment_api/source/_templates/layout.html

docs/en_us/enrollment_api/source/conf.py

docs/en_us/enrollment_api/source/index.rst