Remove favicon handler from index

It's covered by a dedicated handler now.

handler-index.go

@@ -12,11 +12,6 @@ import (
 var indexTemplate = template.Must(template.ParseFS(templateFS, "templates/base.tpl", "templates/index.tpl"))
 
 func (h Handler) index(w http.ResponseWriter, r *http.Request) {
-	if r.URL.String() == "/favicon.ico" {
-		http.Error(w, "nothing to see here", http.StatusNotFound)
-		return
-	}
-
 	logRequest(r)
 
 	if r.Method == "GET" {