viewer.js: remove dead code
viewer.js: remove dead code

Iced-Tea/openseadragon,seanich/openseadragon,sul-dlss/openseadragon,Iced-Tea/openseadragon,LafayetteCollegeLibraries/openseadragon,janelia-flyem/openseadragon,rdlester/openseadragon,msalsbery/openseadragon,goofwear/openseadragon,LarissaSmith/openseadragon,LarissaSmith/openseadragon,avandecreme/openseadragon,daverome/openseadragon,seanich/openseadragon,openseadragon/openseadragon,ricochet2200/openseadragon,lidasong2014/openseadragon,lidasong2014/openseadragon,openseadragon/openseadragon,daverome/openseadragon,rdlester/openseadragon,TMUND/openseadragon,shaunstanislaus/openseadragon,mcanthony/openseadragon,goofwear/openseadragon,mcanthony/openseadragon,msalsbery/openseadragon,avandecreme/openseadragon,shaunstanislaus/openseadragon,TMUND/openseadragon,ricochet2200/openseadragon,janelia-flyem/openseadragon,jmnetus/openseadragon,jmnetus/openseadragon