Remove "cohort stats" option from /analytics
Remove "cohort stats" option from /analytics

Resolves #731

Wowu/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,alpha721/WikiEduDashboard,Wowu/WikiEduDashboard,majakomel/WikiEduDashboard,MusikAnimal/WikiEduDashboard,MusikAnimal/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,feelfreelinux/WikiEduDashboard,alpha721/WikiEduDashboard,KarmaHater/WikiEduDashboard,alpha721/WikiEduDashboard,sejalkhatri/WikiEduDashboard,Wowu/WikiEduDashboard,feelfreelinux/WikiEduDashboard,sejalkhatri/WikiEduDashboard,MusikAnimal/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,feelfreelinux/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,majakomel/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,Wowu/WikiEduDashboard,feelfreelinux/WikiEduDashboard,alpha721/WikiEduDashboard,MusikAnimal/WikiEduDashboard,majakomel/WikiEduDashboard