[core] auto value for 'text-justify' field

scripts/style-spec.js

@@ -3,6 +3,4 @@ var spec = module.exports = require('../mapbox-gl-js/src/style-spec/reference/v8
 // Make temporary modifications here when Native doesn't have all features that JS has.
 delete spec.layout_symbol['symbol-sort-key'];
 delete spec.layout_symbol['symbol-z-order'].values['auto'];
-spec.layout_symbol['symbol-z-order'].default = 'viewport-y';
-
-delete spec.layout_symbol['text-justify'].values['auto'];
+spec.layout_symbol['symbol-z-order'].default = 'viewport-y';