remove unused Event#time_range method.
remove unused Event#time_range method.

dudleysr/calagator-workspace,oktober/calagator,cp/calagator-1,VolunteerOdyssey/calagator,matthewkmayer/calagator,reidab/calagator,iamBalaji/Calagator,matthewkmayer/calagator,shawnacscott/calagator,nblackburn87/calagator,jmcduffie32/calagator,jmcduffie32/calagator,eeeeeean/windchimes,iamBalaji/Calagator,kerrizor/calagator,iamBalaji/Calagator,cp/calagator-1,bencornelis/calagator,jmcduffie32/calagator,dudleysr/calagator-workspace,nblackburn87/calagator,VolunteerOdyssey/calagator,L2-D2/calagator,cp/calagator-1,bencornelis/calagator,jmcduffie32/calagator,L2-D2/calagator,kerrizor/calagator,L2-D2/calagator,iamBalaji/Calagator,nblackburn87/calagator,reidab/calagator,bencornelis/calagator,VolunteerOdyssey/calagator,kerrizor/calagator,L2-D2/calagator,reidab/calagator,kerrizor/calagator,alexbeeken/calagator.org,eeeeeean/windchimes,matthewkmayer/calagator,bencornelis/calagator,matthewkmayer/calagator,oktober/calagator,oktober/calagator,alexbeeken/calagator.org,reidab/calagator,cp/calagator-1,shawnacscott/calagator,oktober/calagator,shawnacscott/calagator,shawnacscott/calagator