Remove unused or unneeded stuff from java_core.dart.

pkg/analyzer/test/dart/ast/ast_test.dart

Index: pkg/analyzer/test/dart/ast/ast_test.dart
diff --git a/pkg/analyzer/test/dart/ast/ast_test.dart b/pkg/analyzer/test/dart/ast/ast_test.dart
index f8d51f15c16f128a81c61b4ec3d21b3b2cd4fec4..1739a6f45cb4b1e363ca9e2b020b795037f3fb34 100644
--- a/pkg/analyzer/test/dart/ast/ast_test.dart
+++ b/pkg/analyzer/test/dart/ast/ast_test.dart
@@ -5,7 +5,6 @@
 library analyzer.test.dart.ast.ast_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/testing/ast_factory.dart';
 import 'package:analyzer/src/generated/testing/token_factory.dart';
@@ -502,7 +501,7 @@ class NodeListTest extends EngineTestCase {
     list.addAll(nodes);
     expect(list, hasLength(3));
     AstNode fourthNode = AstFactory.integer(0);
-    expect(javaListSet(list, 1, fourthNode), same(secondNode));
+    list[1] = fourthNode;
     expect(list, hasLength(3));
     expect(list[0], same(firstNode));
     expect(list[1], same(fourthNode));
@@ -513,7 +512,7 @@ class NodeListTest extends EngineTestCase {
     AstNode node = AstFactory.booleanLiteral(true);
     NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
     try {
-      javaListSet(list, -1, node);
+      list[-1] = node;
       fail("Expected IndexOutOfBoundsException");
     } on RangeError {
       // Expected
@@ -524,7 +523,7 @@ class NodeListTest extends EngineTestCase {
     AstNode node = AstFactory.booleanLiteral(true);
     NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
     try {
-      javaListSet(list, 1, node);
+      list[1] = node;
       fail("Expected IndexOutOfBoundsException");
     } on RangeError {
       // Expected