Removed some cruft from ApiDoc.

sdk/lib/_internal/dartdoc/lib/dartdoc.dart

Index: sdk/lib/_internal/dartdoc/lib/dartdoc.dart
diff --git a/sdk/lib/_internal/dartdoc/lib/dartdoc.dart b/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
index 2520489dca15a220e690d97c1d6c377cfb9fe456..e9882ff8fe61cec26f6448c3b1d39ba1fe53f4ea 100644
--- a/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
+++ b/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
@@ -1465,9 +1465,6 @@ class Dartdoc {
     }
   }
 
-  DocComment createDocComment(String text, [ClassMirror inheritedFrom]) =>
-      new DocComment(text, inheritedFrom);
-
   /** Get the doc comment associated with the given library. */
   DocComment getLibraryComment(LibraryMirror library) => getComment(library);
 
@@ -1511,7 +1508,7 @@ class Dartdoc {
       }
     }
     if (comment == null) return null;
-    return createDocComment(comment, inheritedFrom);
+    return new DocComment(comment, inheritedFrom);
   }
 
   /**