dart2js cps: Clean up and avoid processing unreachable code.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
index c46d410477c9eb4f250631e7315ea3f811ecf488..78b976f913ac698e92a52b3b0220c5a3ff2df4f6 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
@@ -201,12 +201,6 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     return '(Constant $value)';
   }
 
-  String visitCreateFunction(CreateFunction node) {
-    String function =
-        indentBlock(() => indentBlock(() => visit(node.definition)));
-    return '(CreateFunction\n$function)';
-  }
-
   String visitContinuation(Continuation node) {
     String name = newContinuationName(node);
     if (node.isRecursive) name = 'rec $name';
@@ -238,10 +232,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
   String visitTypeTest(TypeTest node) {
     String value = access(node.value);
     String typeArguments = node.typeArguments.map(access).join(' ');
-    String interceptor = node.interceptor == null
-        ? ''
-        : access(node.interceptor);
-    return '(TypeTest $value ${node.dartType} ($typeArguments) ($interceptor))';
+    return '(TypeTest $value ${node.dartType} ($typeArguments))';
   }
 
   String visitTypeTestViaFlag(TypeTestViaFlag node) {