remove docgen source and targets from build

pkg/docgen/lib/src/models/owned_indexable.dart

-// Copyright (c) 2014, 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 docgen.models.owned_indexable;
-
-import '../exports/mirrors_util.dart' as dart2js_util;
-import '../exports/source_mirrors.dart';
-
-import '../library_helpers.dart';
-import '../mdn.dart';
-import '../package_helpers.dart';
-
-import 'annotation.dart';
-import 'dummy_mirror.dart';
-import 'indexable.dart';
-import 'model_helpers.dart';
-
-abstract class OwnedIndexable<TMirror extends DeclarationMirror>
-    extends Indexable<TMirror> {
-  /// List of the meta annotations on this item.
-  final List<Annotation> annotations;
-
-  /// The object one scope-level above which this item is defined.
-  ///
-  /// Ex: The owner for a top level class, would be its enclosing library.
-  /// The owner of a local variable in a method would be the enclosing method.
-  final Indexable owner;
-
-  /// Returns this object's qualified name, but following the conventions
-  /// we're using in Dartdoc, which is that library names with dots in them
-  /// have them replaced with hyphens.
-  String get docName => owner.docName + '.' + dart2js_util.nameOf(mirror);
-
-  OwnedIndexable(DeclarationMirror mirror, Indexable owner)
-      : annotations = createAnnotations(mirror, owner.owningLibrary),
-        this.owner = owner,
-        super(mirror);
-
-  /// Generates MDN comments from database.json.
-  String getMdnComment() {
-    var domAnnotation = this.annotations.firstWhere(
-        (e) => e.mirror.qualifiedName == #metadata.DomName,
-        orElse: () => null);
-    if (domAnnotation == null) return '';
-    var domName = domAnnotation.parameters.single;
-
-    return mdnComment(rootDirectory, logger, domName);
-  }
-
-  String get packagePrefix => owner.packagePrefix;
-
-  String findElementInScope(String name) {
-    var lookupFunc = determineLookupFunc(name);
-    var result = lookupFunc(mirror, name);
-    if (result != null) {
-      result = getDocgenObject(result);
-      if (result is DummyMirror) return packagePrefix + result.docName;
-      return result.packagePrefix + result.docName;
-    }
-
-    if (owner != null) {
-      var result = owner.findElementInScope(name);
-      if (result != null) {
-        return result;
-      }
-    }
-    return super.findElementInScope(name);
-  }
-}