fix(ui): remove unnecessary parsing

Author: wanweitao

presto-ui/src/components/QueryDetail.jsx

@@ -109,7 +109,7 @@ function TaskList({tasks}) {
     function calculateElapsedTime(row) {
         let elapsedTime = parseDuration(row.stats.elapsedTimeInNanos + "ns");
         if (elapsedTime === 0) {
-            elapsedTime = Date.now() - Date.parse(row.stats.createTimeInMillis);
+            elapsedTime = Date.now() - row.stats.createTimeInMillis;
         }
         return elapsedTime;
     }

presto-ui/src/components/QueryOverview.jsx

@@ -285,7 +285,7 @@ function TaskList({ tasks }: { tasks: Task[] }) : React.Node {
     function calculateElapsedTime(row: Task): number {
         let elapsedTime = parseDuration(row.stats.elapsedTimeInNanos + "ns") || 0;
         if (elapsedTime === 0) {
-            elapsedTime = Date.now() - Date.parse(row.stats.createTimeInMillis);
+            elapsedTime = Date.now() - row.stats.createTimeInMillis;
         }
         return elapsedTime;
     }