revert

app/src/plot_task.js

@@ -276,7 +276,7 @@ async function getMetricsForTask(langCode, task) {
       download: true,
       header: true,
       complete: function(results) {
-        const metrics = [...new Set(results.data.map(row => row.metric))];
+        const metrics = [...new Set(results.data.map(row => row.metric).filter(metric => metric))];
         resolve(metrics);
       },
       error: function(error) {