* [CI] Remove CUDA 9.0 from Windows CI. (#5674) * Remove CUDA 9.0 on Windows CI. * Require cuda10 tag, to differentiate Co-authored-by: Philip Hyunsu Cho <chohyu01@cs.washington.edu> * Pylint. Co-authored-by: Philip Hyunsu Cho <chohyu01@cs.washington.edu>