* Revert "Add scikit-learn as dependency for doc build (#3677)" This reverts commit 308f664ade0547242608e21f6198c895415f03da. * Revert "Add scikit-learn tests (#3674)" This reverts commit d176a0fbc8165e3afe3e42ff464ab7b253211555.
The documentation of xgboost is generated with recommonmark and sphinx. You can build it locally by typing "make html" in this folder. Checkout https://recommonmark.readthedocs.org for guide on how to write markdown with extensions used in this doc, such as math formulas and table of content.