feat(bootstrap): remove the need for explicit reflection setup in bootstrap code

BREAKING CHANGES:

Dart applications and TypeScript applications meant to transpile to Dart must now
import `package:angular2/bootstrap.dart` instead of `package:angular2/angular2.dart`
in their bootstrap code. `package:angular2/angular2.dart` no longer export the
bootstrap function. The transformer rewrites imports of `bootstrap.dart` and calls
to `bootstrap` to `bootstrap_static.dart` and `bootstrapStatic` respectively.

modules/angular2/src/transform/reflection_remover/codegen.dart

@@ -1,6 +1,5 @@
 library angular2.transform.reflection_remover.codegen;
 
-import 'package:analyzer/src/generated/ast.dart';
 import 'package:path/path.dart' as path;
 
 import 'package:angular2/src/transform/common/names.dart';
@@ -36,45 +35,10 @@ class Codegen {
 
   /// Generates code to call the method which sets up Angular2 reflection
   /// statically.
-  ///
-  /// If `reflectorAssignment` is provided, it is expected to be the node
-  /// representing the {@link ReflectionCapabilities} assignment, and we will
-  /// attempt to parse the access of `reflector` from it so that `reflector` is
-  /// properly prefixed if necessary.
-  String codegenSetupReflectionCall(
-      {AssignmentExpression reflectorAssignment}) {
-    var reflectorExpression = null;
-    if (reflectorAssignment != null) {
-      reflectorExpression = reflectorAssignment.accept(new _ReflectorVisitor());
-    }
-    if (reflectorExpression == null) {
-      reflectorExpression = 'reflector';
-    }
-
+  String codegenSetupReflectionCall() {
     var count = 0;
     return importUris
         .map((_) => '${prefix}${count++}.${SETUP_METHOD_NAME}();')
         .join('');
   }
 }
-
-/// A visitor whose job it is to find the access of `reflector`.
-class _ReflectorVisitor extends Object with SimpleAstVisitor<Expression> {
-  @override
-  Expression visitAssignmentExpression(AssignmentExpression node) {
-    if (node == null || node.leftHandSide == null) return null;
-    return node.leftHandSide.accept(this);
-  }
-
-  @override
-  Expression visitPropertyAccess(PropertyAccess node) {
-    if (node == null || node.target == null) return null;
-    return node.target;
-  }
-
-  @override
-  Expression visitPrefixedIdentifier(PrefixedIdentifier node) {
-    if (node == null || node.prefix == null) return null;
-    return node.prefix;
-  }
-}