Revert "weekly cohort visualization modeled after chort.js"
Revert "weekly cohort visualization modeled after chort.js"

This reverts commit 6210d6ab805ad79ab811eb06914993ec5b17ac69.

stefanseifert/redash,alexanderlz/redash,moritz9/redash,imsally/redash,akariv/redash,denisov-vlad/redash,M32Media/redash,hudl/redash,crowdworks/redash,44px/redash,easytaxibr/redash,vishesh92/redash,hudl/redash,rockwotj/redash,imsally/redash,EverlyWell/redash,EverlyWell/redash,vishesh92/redash,amino-data/redash,moritz9/redash,denisov-vlad/redash,getredash/redash,rockwotj/redash,EverlyWell/redash,chriszs/redash,denisov-vlad/redash,pubnative/redash,moritz9/redash,ninneko/redash,imsally/redash,pubnative/redash,hudl/redash,useabode/redash,crowdworks/redash,guaguadev/redash,guaguadev/redash,denisov-vlad/redash,alexanderlz/redash,44px/redash,guaguadev/redash,vishesh92/redash,guaguadev/redash,EverlyWell/redash,easytaxibr/redash,jmvasquez/redashtest,hudl/redash,stefanseifert/redash,ninneko/redash,alexanderlz/redash,amino-data/redash,getredash/redash,chriszs/redash,moritz9/redash,jmvasquez/redashtest,crowdworks/redash,crowdworks/redash,rockwotj/redash,easytaxibr/redash,useabode/redash,stefanseifert/redash,jmvasquez/redashtest,44px/redash,vishesh92/redash,M32Media/redash,guaguadev/redash,easytaxibr/redash,ninneko/redash,amino-data/redash,imsally/redash,pubnative/redash,rockwotj/redash,stefanseifert/redash,alexanderlz/redash,jmvasquez/redashtest,ninneko/redash,akariv/redash,akariv/redash,useabode/redash,jmvasquez/redashtest,akariv/redash,pubnative/redash,amino-data/redash,44px/redash,pubnative/redash,getredash/redash,getredash/redash,stefanseifert/redash,easytaxibr/redash,akariv/redash,useabode/redash,ninneko/redash,denisov-vlad/redash,M32Media/redash,chriszs/redash,getredash/redash,M32Media/redash,chriszs/redash