Revert "dart2js: add support for configuration-specific imports."

pkg/compiler/lib/src/parser/partial_parser.dart

Index: pkg/compiler/lib/src/parser/partial_parser.dart
diff --git a/pkg/compiler/lib/src/parser/partial_parser.dart b/pkg/compiler/lib/src/parser/partial_parser.dart
index 1c7722f881d7c82c9baf3f9101a8b717169a071e..01de07c85a3ab0e1c0c251e2935515f5aefc79ab 100644
--- a/pkg/compiler/lib/src/parser/partial_parser.dart
+++ b/pkg/compiler/lib/src/parser/partial_parser.dart
@@ -20,9 +20,7 @@ import 'parser.dart' show
     Parser;
 
 class PartialParser extends Parser {
-  PartialParser(Listener listener, {bool enableConditionalDirectives})
-      : super(listener,
-          enableConditionalDirectives: enableConditionalDirectives);
+  PartialParser(Listener listener) : super(listener);
 
   Token parseClassBody(Token token) => skipClassBody(token);