Delete unused readFunction.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
index 3912a8d8e4cb4db9041fff0dd755ef3748dacfb0..b75c82efd625b4ce4e92fd7854e73fac879c2c36 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
@@ -385,12 +385,6 @@ String readInt(String array, String index) {
       'int');
 }
 
-String readFunction(String array, String index) {
-  return readChecked(
-      array, index, 'result != null && typeof result != "function"',
-      'function');
-}
-
 String readFunctionType(String array, String index) {
   return readChecked(
       array, index,