Remove flights example

sky/benchmarks/framework/flights-app.sky

Index: sky/benchmarks/framework/flights-app.sky
diff --git a/sky/benchmarks/framework/flights-app.sky b/sky/benchmarks/framework/flights-app.sky
deleted file mode 100644
index 4b480550d0499564dd1fd4a5100e67cfd1f752f3..0000000000000000000000000000000000000000
--- a/sky/benchmarks/framework/flights-app.sky
+++ /dev/null
@@ -1,24 +0,0 @@
-<sky>
-<import src="/sky/benchmarks/resources/runner.sky" as="PerfRunner" />
-<import src="/sky/examples/flights-app/flights-app.sky" as="FlightsAppElement" />
-<script>
-var sky = document.querySelector("sky");
-var element;
-
-var runner = new PerfRunner({
-  setup: function() {
-    // Don't benchmark removal.
-    if (element)
-      element.remove();
-  },
-  iterations: 10,
-  unit: "ms",
-});
-
-runner.runAsync(function(done) {
-  element = new FlightsAppElement();
-  sky.appendChild(element);
-  done();
-});
-</script>
-</sky>