Remove convertConstructors.

pkg/front_end/lib/src/fasta/builder/builder.dart

Index: pkg/front_end/lib/src/fasta/builder/builder.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/builder.dart b/pkg/front_end/lib/src/fasta/builder/builder.dart
index 5e5058775b76b93e8bf8ac95cc087a9c1c904c46..0fcc82d7fcce263f6a2f132fd3a97f98ef92d0f0 100644
--- a/pkg/front_end/lib/src/fasta/builder/builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/builder.dart
@@ -104,11 +104,6 @@ abstract class Builder {
   /// return the number of constructors resolved.
   int resolveConstructors(Builder parent) => 0;
 
-  /// Look for methods with the same name as their enclosing class and convert
-  /// them to constructors. Return the number of methods converted to
-  /// constructors.
-  int convertConstructors(Builder parent) => 0;
-
   /// This builder and [other] has been imported into [library] using [name].
   ///
   /// This method handles this case according to the Dart language