Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/parse_compilation_unit_test.dart

Index: pkg/analyzer/test/parse_compilation_unit_test.dart
diff --git a/pkg/analyzer/test/parse_compilation_unit_test.dart b/pkg/analyzer/test/parse_compilation_unit_test.dart
index 2ef6a60cf47ffeb967676f707c3c06e9402cb0e1..87f441dafb78ed62ce25593a47487033b52002a6 100644
--- a/pkg/analyzer/test/parse_compilation_unit_test.dart
+++ b/pkg/analyzer/test/parse_compilation_unit_test.dart
@@ -7,10 +7,7 @@ library analyzer.test.parse_compilation_unit_test;
 import 'package:analyzer/analyzer.dart';
 import 'package:test/test.dart';
 
-import 'utils.dart';
-
 void main() {
-  initializeTestEnvironment();
   test("parses a valid compilation unit successfully", () {
     var unit = parseCompilationUnit("void main() => print('Hello, world!');");
     expect(unit.toString(), equals("void main() => print('Hello, world!');"));