Remove some unused code.

sdk/lib/_internal/pub/test/serve/utils.dart

Index: sdk/lib/_internal/pub/test/serve/utils.dart
diff --git a/sdk/lib/_internal/pub/test/serve/utils.dart b/sdk/lib/_internal/pub/test/serve/utils.dart
index 53756d67452abe93d8b049347dc1008ce4a34c12..128917a1a0c1fdcca6b87559f22e640ee6bf2b24 100644
--- a/sdk/lib/_internal/pub/test/serve/utils.dart
+++ b/sdk/lib/_internal/pub/test/serve/utils.dart
@@ -86,15 +86,3 @@ void waitForBuildSuccess() {
 
   schedule(nextLine);
 }
-
-/// Returns a [Future] that completes after pumping the event queue [times]
-/// times. By default, this should pump the event queue enough times to allow
-/// any code to run, as long as it's not waiting on some external event.
-Future _pumpEventQueue([int times=20]) {
-  if (times == 0) return new Future.value();
-  // We use a delayed future to allow runAsync events to finish. The
-  // Future.value or Future() constructors use runAsync themselves and would
-  // therefore not wait for runAsync callbacks that are scheduled after invoking
-  // this method.
-  return new Future.delayed(Duration.ZERO, () => _pumpEventQueue(times - 1));
-}