Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/dart/test_all.dart

Index: pkg/analyzer/test/dart/test_all.dart
diff --git a/pkg/analyzer/test/dart/test_all.dart b/pkg/analyzer/test/dart/test_all.dart
index 2be35323cfc6785603042cf82b26f41521332830..7827a63b3b5fd3143a84ab3b265f92aef56226c0 100644
--- a/pkg/analyzer/test/dart/test_all.dart
+++ b/pkg/analyzer/test/dart/test_all.dart
@@ -6,13 +6,11 @@ library analyzer.test.generated.test_all;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../utils.dart';
 import 'ast/test_all.dart' as ast;
 import 'element/test_all.dart' as element;
 
 /// Utility for manually running all tests.
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     ast.main();
     element.main();