rewrite favicon discovery logic

src/server/routes.go

@@ -471,7 +471,6 @@ func (s *Server) handleOPMLImport(c *router.Context) {
 			}
 		}
 
-		s.worker.FindFavicons()
 		s.worker.RefreshFeeds()
 
 		c.Out.WriteHeader(http.StatusOK)

src/server/server.go

@@ -49,7 +49,6 @@ func (h *Server) GetAddr() string {
 
 func (s *Server) Start() {
 	refreshRate := s.db.GetSettings().RefreshRate
-	s.worker.FindFavicons()
 	s.worker.StartFeedCleaner()
 	s.worker.SetRefreshRate(refreshRate)
 	if refreshRate > 0 {