refactor: remove obsolete setting ENABLE_INSTRUCTOR_ANALYTICS (#27720)
refactor: remove obsolete setting ENABLE_INSTRUCTOR_ANALYTICS (#27720)

ENABLE_INSTRUCTOR_ANALYTICS was removed in 2015 by bb7ba752bdb839a05cbc413eb624da9822039905
angelapper/edx-platform,eduNEXT/edx-platform,edx/edx-platform,eduNEXT/edx-platform,angelapper/edx-platform,arbrandes/edx-platform,eduNEXT/edx-platform,edx/edx-platform,eduNEXT/edx-platform,edx/edx-platform,arbrandes/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,angelapper/edx-platform,edx/edx-platform,arbrandes/edx-platform