gui: Remove unused variables (#5665)

gui/default/syncthing/core/identiconDirective.js

@@ -23,7 +23,6 @@ angular.module('syncthing.core')
 
                 svg.appendChild(rect);
             };
-            var rect;
             var row;
             var col;
             var middleCol;

gui/default/syncthing/core/localeService.js

@@ -8,7 +8,6 @@ angular.module('syncthing.core')
                 var uid = new Date();
                 var storage = window.localStorage;
                 storage.setItem(uid, uid);
-                var success = storage.getItem(uid) == uid;
                 storage.removeItem(uid);
                 return storage;
             } catch (exception) {