Fix build issues.

components/layout/Header.js

@@ -18,7 +18,7 @@ import Bars from 'assets/bars.svg';
 export default function Header() {
   const user = useSelector(state => state.user);
   const [active, setActive] = useState(false);
-  const { locale, dir } = useLocale();
+  const { dir } = useLocale();
 
   function handleClick() {
     setActive(state => !state);

components/metrics/FilterTags.js

@@ -15,7 +15,7 @@ export default function FilterTags({ params, onClick }) {
           return null;
         }
         return (
-          <div className={styles.tag}>
+          <div key={key} className={styles.tag}>
             <Button icon={<Times />} onClick={() => onClick(key)} variant="action" iconRight>
               {`${key}: ${params[key]}`}
             </Button>