Remove convertConstructors.

pkg/front_end/lib/src/fasta/source/source_loader.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.source_loader;
 
 import 'dart:async' show
     Future;
 
 import 'dart:io' show
@@ skipping 210 matching lines @@
   }
 
   void resolveTypes() {
     int typeCount = 0;
     builders.forEach((Uri uri, LibraryBuilder library) {
       typeCount += library.resolveTypes(null);
     });
     ticker.logMs("Resolved $typeCount types");
   }
 
-  void convertConstructors() {
-    int count = 0;
-    builders.forEach((Uri uri, LibraryBuilder library) {
-      count += library.convertConstructors(null);
-    });
-    ticker.logMs("Converted $count constructors");
-  }
-
   void finishStaticInvocations() {
     int count = 0;
     builders.forEach((Uri uri, LibraryBuilder library) {
       count += library.finishStaticInvocations();
     });
     ticker.logMs("Finished static invocations $count");
   }
 
   void resolveConstructors() {
     int count = 0;
@@ skipping 97 matching lines @@
     ticker.logMs("Built analyzer element model.");
   }
 
   void computeHierarchy(Program program) {
     hierarchy = new ClassHierarchy(program);
     ticker.logMs("Computed class hierarchy");
     coreTypes = new CoreTypes(program);
     ticker.logMs("Computed core types");
   }
 }