Remove a missed piece of the test support for older legacy code completion support

Change-Id: I49a547ccfea531866a57da83691b21bcd7118b80
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/339203
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
diff --git a/pkg/analysis_server/test/client/completion_driver_test.dart b/pkg/analysis_server/test/client/completion_driver_test.dart
index 3dc9d18..11b8930 100644
--- a/pkg/analysis_server/test/client/completion_driver_test.dart
+++ b/pkg/analysis_server/test/client/completion_driver_test.dart
@@ -163,7 +163,7 @@
   }
 
   Future<List<CompletionSuggestion>> getSuggestions() async {
-    suggestions = await driver.getSuggestions2();
+    suggestions = await driver.getSuggestions();
     return suggestions;
   }
 
diff --git a/pkg/analysis_server/test/client/impl/completion_driver.dart b/pkg/analysis_server/test/client/impl/completion_driver.dart
index 05dac8a..c206653 100644
--- a/pkg/analysis_server/test/client/impl/completion_driver.dart
+++ b/pkg/analysis_server/test/client/impl/completion_driver.dart
@@ -123,19 +123,6 @@
   }
 
   Future<List<CompletionSuggestion>> getSuggestions() async {
-    var request = CompletionGetSuggestionsParams(
-      server.convertPath(server.testFilePath),
-      completionOffset,
-    ).toRequest('0');
-    var response = await server.handleRequest(request);
-    var result = CompletionGetSuggestionsResult.fromResponse(response);
-    completionId = result.id;
-    assertValidId(completionId);
-    await _getResultsCompleter(completionId).future;
-    return suggestions;
-  }
-
-  Future<List<CompletionSuggestion>> getSuggestions2() async {
     var request = CompletionGetSuggestions2Params(
       server.convertPath(server.testFilePath),
       completionOffset,