[VM/Service] Delete waitForServiceInfo from service_test_common.dart

It is now dead code.

Change-Id: I181cd5ca9f649348763ae9327cb2af62617af8ad
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419642
Reviewed-by: Ben Konyi <[email protected]>
Commit-Queue: Derek Xu <[email protected]>

Author: derekxu16

pkg/vm_service/test/common/service_test_common.dart

@@ -5,7 +5,6 @@
 library service_test_common;
 
 import 'dart:async';
-import 'dart:developer';
 import 'dart:typed_data';
 
 import 'package:path/path.dart' as p;
@@ -590,18 +589,6 @@ List<String> removeAdjacentDuplicates(List<String> fromList) {
   return result;
 }
 
-/// Waits for ServiceProtocolInfo.serverUri to be populated.
-Future<ServiceProtocolInfo> waitForServiceInfo() async {
-  print('Waiting for the VM service URI to become available...');
-  var info = await Service.getInfo();
-  while (info.serverUri == null) {
-    await Future.delayed(const Duration(milliseconds: 100));
-    info = await Service.getInfo();
-  }
-  print('VM service URI has become available: ${info.serverUri}');
-  return info;
-}
-
 typedef ServiceExtensionHandler = Future<Map<String, dynamic>> Function(
   Map<String, dynamic> cb,
 );