Remove 'initializeTestEnvironment' from 'analysis_server'.

pkg/analysis_server/test/integration/completion/test_all.dart

Index: pkg/analysis_server/test/integration/completion/test_all.dart
diff --git a/pkg/analysis_server/test/integration/completion/test_all.dart b/pkg/analysis_server/test/integration/completion/test_all.dart
index 89b28f4b732ab15acb4120c8e84d3588da7d1da0..580ffcaaf76df9c0f9c2d770fe068783750c1143 100644
--- a/pkg/analysis_server/test/integration/completion/test_all.dart
+++ b/pkg/analysis_server/test/integration/completion/test_all.dart
@@ -6,14 +6,12 @@ library test.integration.completion.all;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../../utils.dart';
 import 'get_suggestions_test.dart' as get_suggestions_test;
 
 /**
  * Utility for manually running all integration tests.
  */
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     get_suggestions_test.main();
   }, name: 'completion');