Remove return where no return value is expected.
Remove return where no return value is expected.

zerver.lib.notifications.send_future_email has return type None.
So replace `return send_future_email(...` by `send_future_email(...`.

christi3k/zulip,aakash-cr7/zulip,zulip/zulip,samatdav/zulip,vaidap/zulip,eeshangarg/zulip,showell/zulip,cosmicAsymmetry/zulip,synicalsyntax/zulip,showell/zulip,grave-w-grave/zulip,tommyip/zulip,rishig/zulip,amyliu345/zulip,aakash-cr7/zulip,blaze225/zulip,rishig/zulip,rht/zulip,ryanbackman/zulip,susansls/zulip,rishig/zulip,KingxBanana/zulip,vikas-parashar/zulip,blaze225/zulip,paxapy/zulip,mahim97/zulip,dattatreya303/zulip,eeshangarg/zulip,mahim97/zulip,JPJPJPOPOP/zulip,ahmadassaf/zulip,calvinleenyc/zulip,vabs22/zulip,samatdav/zulip,susansls/zulip,paxapy/zulip,mohsenSy/zulip,KingxBanana/zulip,calvinleenyc/zulip,punchagan/zulip,sharmaeklavya2/zulip,tommyip/zulip,sonali0901/zulip,j831/zulip,rishig/zulip,synicalsyntax/zulip,JPJPJPOPOP/zulip,sharmaeklavya2/zulip,grave-w-grave/zulip,ahmadassaf/zulip,dattatreya303/zulip,cosmicAsymmetry/zulip,isht3/zulip,punchagan/zulip,dhcrzf/zulip,susansls/zulip,peguin40/zulip,umkay/zulip,dhcrzf/zulip,sup95/zulip,samatdav/zulip,isht3/zulip,Diptanshu8/zulip,amyliu345/zulip,Juanvulcano/zulip,mahim97/zulip,umkay/zulip,jrowan/zulip,mohsenSy/zulip,cosmicAsymmetry/zulip,Juanvulcano/zulip,Jianchun1/zulip,shubhamdhama/zulip,jackrzhang/zulip,vabs22/zulip,jrowan/zulip,jphilipsen05/zulip,reyha/zulip,niftynei/zulip,christi3k/zulip,isht3/zulip,Galexrt/zulip,blaze225/zulip,souravbadami/zulip,hackerkid/zulip,hackerkid/zulip,jackrzhang/zulip,zacps/zulip,AZtheAsian/zulip,mohsenSy/zulip,dattatreya303/zulip,souravbadami/zulip,AZtheAsian/zulip,jackrzhang/zulip,peguin40/zulip,zulip/zulip,Galexrt/zulip,synicalsyntax/zulip,joyhchen/zulip,kou/zulip,synicalsyntax/zulip,Jianchun1/zulip,niftynei/zulip,showell/zulip,jphilipsen05/zulip,brainwane/zulip,jphilipsen05/zulip,calvinleenyc/zulip,vaidap/zulip,cosmicAsymmetry/zulip,j831/zulip,susansls/zulip,grave-w-grave/zulip,AZtheAsian/zulip,hackerkid/zulip,andersk/zulip,KingxBanana/zulip,Galexrt/zulip,zulip/zulip,eeshangarg/zulip,arpith/zulip,paxapy/zulip,mohsenSy/zulip,sup95/zulip,zulip/zulip,vaidap/zulip,ahmadassaf/zulip,peguin40/zulip,Diptanshu8/zulip,Galexrt/zulip,j831/zulip,TigorC/zulip,Juanvulcano/zulip,kou/zulip,reyha/zulip,zulip/zulip,rht/zulip,amanharitsh123/zulip,zacps/zulip,tommyip/zulip,kou/zulip,sup95/zulip,jackrzhang/zulip,AZtheAsian/zulip,reyha/zulip,reyha/zulip,Diptanshu8/zulip,ahmadassaf/zulip,dhcrzf/zulip,grave-w-grave/zulip,PhilSk/zulip,JPJPJPOPOP/zulip,krtkmj/zulip,sonali0901/zulip,vaidap/zulip,JPJPJPOPOP/zulip,rht/zulip,jrowan/zulip,zacps/zulip,niftynei/zulip,amyliu345/zulip,SmartPeople/zulip,vabs22/zulip,rishig/zulip,amanharitsh123/zulip,niftynei/zulip,jackrzhang/zulip,ryanbackman/zulip,PhilSk/zulip,shubhamdhama/zulip,zulip/zulip,zacps/zulip,andersk/zulip,jackrzhang/zulip,synicalsyntax/zulip,kou/zulip,j831/zulip,aakash-cr7/zulip,reyha/zulip,jainayush975/zulip,Juanvulcano/zulip,tommyip/zulip,andersk/zulip,samatdav/zulip,krtkmj/zulip,SmartPeople/zulip,souravbadami/zulip,tommyip/zulip,zacps/zulip,rishig/zulip,punchagan/zulip,ahmadassaf/zulip,eeshangarg/zulip,sup95/zulip,sup95/zulip,Jianchun1/zulip,krtkmj/zulip,vikas-parashar/zulip,PhilSk/zulip,arpith/zulip,sharmaeklavya2/zulip,hackerkid/zulip,tommyip/zulip,JPJPJPOPOP/zulip,KingxBanana/zulip,sharmaeklavya2/zulip,arpith/zulip,brainwane/zulip,krtkmj/zulip,vikas-parashar/zulip,rht/zulip,krtkmj/zulip,dhcrzf/zulip,SmartPeople/zulip,brockwhittaker/zulip,JPJPJPOPOP/zulip,joyhchen/zulip,AZtheAsian/zulip,ahmadassaf/zulip,timabbott/zulip,amyliu345/zulip,christi3k/zulip,cosmicAsymmetry/zulip,shubhamdhama/zulip,arpith/zulip,brockwhittaker/zulip,zulip/zulip,susansls/zulip,brainwane/zulip,blaze225/zulip,peguin40/zulip,souravbadami/zulip,kou/zulip,Jianchun1/zulip,rht/zulip,andersk/zulip,isht3/zulip,vikas-parashar/zulip,peguin40/zulip,vabs22/zulip,timabbott/zulip,eeshangarg/zulip,timabbott/zulip,amanharitsh123/zulip,j831/zulip,jainayush975/zulip,verma-varsha/zulip,jrowan/zulip,blaze225/zulip,jainayush975/zulip,sonali0901/zulip,shubhamdhama/zulip,dawran6/zulip,vaidap/zulip,punchagan/zulip,krtkmj/zulip,jainayush975/zulip,Diptanshu8/zulip,reyha/zulip,vabs22/zulip,joyhchen/zulip,susansls/zulip,synicalsyntax/zulip,shubhamdhama/zulip,jrowan/zulip,joyhchen/zulip,souravbadami/zulip,Galexrt/zulip,arpith/zulip,PhilSk/zulip,dhcrzf/zulip,jphilipsen05/zulip,calvinleenyc/zulip,samatdav/zulip,arpith/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,jainayush975/zulip,eeshangarg/zulip,PhilSk/zulip,christi3k/zulip,showell/zulip,KingxBanana/zulip,Juanvulcano/zulip,joyhchen/zulip,Jianchun1/zulip,SmartPeople/zulip,calvinleenyc/zulip,isht3/zulip,punchagan/zulip,ryanbackman/zulip,niftynei/zulip,blaze225/zulip,mohsenSy/zulip,joyhchen/zulip,punchagan/zulip,showell/zulip,dawran6/zulip,christi3k/zulip,paxapy/zulip,tommyip/zulip,brockwhittaker/zulip,j831/zulip,paxapy/zulip,amanharitsh123/zulip,christi3k/zulip,umkay/zulip,umkay/zulip,ryanbackman/zulip,verma-varsha/zulip,kou/zulip,jackrzhang/zulip,sonali0901/zulip,mahim97/zulip,rht/zulip,umkay/zulip,rht/zulip,aakash-cr7/zulip,jphilipsen05/zulip,sharmaeklavya2/zulip,vabs22/zulip,hackerkid/zulip,PhilSk/zulip,vikas-parashar/zulip,cosmicAsymmetry/zulip,dhcrzf/zulip,amyliu345/zulip,SmartPeople/zulip,dattatreya303/zulip,zacps/zulip,amanharitsh123/zulip,dattatreya303/zulip,sharmaeklavya2/zulip,verma-varsha/zulip,Galexrt/zulip,aakash-cr7/zulip,KingxBanana/zulip,dawran6/zulip,kou/zulip,showell/zulip,samatdav/zulip,timabbott/zulip,mahim97/zulip,hackerkid/zulip,peguin40/zulip,brainwane/zulip,niftynei/zulip,aakash-cr7/zulip,brockwhittaker/zulip,verma-varsha/zulip,Galexrt/zulip,brainwane/zulip,jainayush975/zulip,paxapy/zulip,TigorC/zulip,showell/zulip,dawran6/zulip,ryanbackman/zulip,verma-varsha/zulip,dhcrzf/zulip,vaidap/zulip,timabbott/zulip,amanharitsh123/zulip,TigorC/zulip,eeshangarg/zulip,ahmadassaf/zulip,grave-w-grave/zulip,sonali0901/zulip,timabbott/zulip,mohsenSy/zulip,grave-w-grave/zulip,brockwhittaker/zulip,andersk/zulip,brockwhittaker/zulip,punchagan/zulip,TigorC/zulip,Jianchun1/zulip,rishig/zulip,souravbadami/zulip,amyliu345/zulip,TigorC/zulip,hackerkid/zulip,Juanvulcano/zulip,shubhamdhama/zulip,mahim97/zulip,jrowan/zulip,brainwane/zulip,synicalsyntax/zulip,brainwane/zulip,calvinleenyc/zulip,dattatreya303/zulip,krtkmj/zulip,verma-varsha/zulip,dawran6/zulip,vikas-parashar/zulip,jphilipsen05/zulip,umkay/zulip,Diptanshu8/zulip,ryanbackman/zulip,andersk/zulip,sup95/zulip,sonali0901/zulip,AZtheAsian/zulip,isht3/zulip,Diptanshu8/zulip,umkay/zulip,SmartPeople/zulip,dawran6/zulip,TigorC/zulip