Remove some commented cruft from reqirements.
Remove some commented cruft from reqirements.

jbassen/edx-platform,caesar2164/edx-platform,Stanford-Online/edx-platform,jbassen/edx-platform,jbassen/edx-platform,Stanford-Online/edx-platform,caesar2164/edx-platform,caesar2164/edx-platform,jbassen/edx-platform,jbassen/edx-platform,Stanford-Online/edx-platform,caesar2164/edx-platform,Stanford-Online/edx-platform