Disable flaky LegacyJavaScript test

Bug: 407863111
Change-Id: Ie5643db696867a63b46b4be5ac85aa500bea7878
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6424739
Commit-Queue: Simon Zünd <[email protected]>
Auto-Submit: Eric Leese <[email protected]>
Commit-Queue: Eric Leese <[email protected]>
Reviewed-by: Simon Zünd <[email protected]>

Author: Eric Leese

front_end/models/trace/insights/LegacyJavaScript.test.ts

@@ -22,7 +22,8 @@ describeWithEnvironment('LegacyJavaScript', function() {
     assert.deepEqual(insight.metricSavings, {FCP: 0, LCP: 0} as Trace.Insights.Types.MetricSavings);
   });
 
-  it('has results when savings are big enough', async function() {
+  // Flaky test.
+  it.skip('[crbug.com/407863111] has results when savings are big enough', async function() {
     if (this.timeout() > 0) {
       this.timeout(20000);
     }