stop logging front-end-events to Keen
stop logging front-end-events to Keen

 * We don't use this collection anymore, so stop wasting time logging
   it.

   [ENG-1963]

CenterForOpenScience/osf.io,CenterForOpenScience/osf.io,adlius/osf.io,adlius/osf.io,felliott/osf.io,brianjgeiger/osf.io,aaxelb/osf.io,aaxelb/osf.io,aaxelb/osf.io,felliott/osf.io,mfraezz/osf.io,Johnetordoff/osf.io,brianjgeiger/osf.io,cslzchen/osf.io,brianjgeiger/osf.io,felliott/osf.io,brianjgeiger/osf.io,Johnetordoff/osf.io,baylee-d/osf.io,mfraezz/osf.io,Johnetordoff/osf.io,cslzchen/osf.io,baylee-d/osf.io,Johnetordoff/osf.io,adlius/osf.io,cslzchen/osf.io,mfraezz/osf.io,adlius/osf.io,felliott/osf.io,CenterForOpenScience/osf.io,baylee-d/osf.io,cslzchen/osf.io,CenterForOpenScience/osf.io,mfraezz/osf.io,aaxelb/osf.io