Revert "Add support for the new function-type syntax."

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

Index: pkg/compiler/lib/src/parser/partial_elements.dart
diff --git a/pkg/compiler/lib/src/parser/partial_elements.dart b/pkg/compiler/lib/src/parser/partial_elements.dart
index 6cbc22c5707ca0d863fc9af0b9305c04148651bb..ca1ef2e1068656628c4b04863057e12e4e78e254 100644
--- a/pkg/compiler/lib/src/parser/partial_elements.dart
+++ b/pkg/compiler/lib/src/parser/partial_elements.dart
@@ -42,9 +42,7 @@ import 'node_listener.dart' show NodeListener;
 class ClassElementParser extends ClassMemberParser {
   ClassElementParser(Listener listener) : super(listener);
 
-  Token parseFormalParameters(Token token, {bool inFunctionType: false}) {
-    return skipFormalParameters(token);
-  }
+  Token parseFormalParameters(Token token) => skipFormalParameters(token);
 }
 
 abstract class PartialElement implements DeclarationSite {