Remove locale

Author: kurkle

src/core/core.defaults.js

@@ -61,7 +61,6 @@ export class Defaults {
 			mode: 'nearest',
 			intersect: true
 		};
-		this.locale = () => navigator ? (navigator.languages ? navigator.languages[0] : navigator.language) : 'en-US';
 		this.maintainAspectRatio = true;
 		this.onHover = null;
 		this.onClick = null;