Remove LibraryElement.visibleLibraries.

pkg/analyzer/lib/dart/element/element.dart

Index: pkg/analyzer/lib/dart/element/element.dart
diff --git a/pkg/analyzer/lib/dart/element/element.dart b/pkg/analyzer/lib/dart/element/element.dart
index aa6e80d96c4a9e891feda7456da3df51a0cc3393..307ad1b6b9ce304b297574cd3e572d865a7cc0f4 100644
--- a/pkg/analyzer/lib/dart/element/element.dart
+++ b/pkg/analyzer/lib/dart/element/element.dart
@@ -1482,11 +1482,6 @@ abstract class LibraryElement implements Element {
   List<CompilationUnitElement> get units;
 
   /**
-   * Return a list containing all directly and indirectly imported libraries.
-   */
-  List<LibraryElement> get visibleLibraries;
-
-  /**
    * Return a list containing all of the imports that share the given [prefix],
    * or an empty array if there are no such imports.
    */