Revert "Added page to Observatory to display native memory allocation information."

runtime/observatory/lib/src/app/page.dart

Index: runtime/observatory/lib/src/app/page.dart
diff --git a/runtime/observatory/lib/src/app/page.dart b/runtime/observatory/lib/src/app/page.dart
index ddbec83872f6d3baec7ea3a0ca6b4cd5ccbc8ad3..aaee452b135d35eb50b06d9c747b37b4c3060e33 100644
--- a/runtime/observatory/lib/src/app/page.dart
+++ b/runtime/observatory/lib/src/app/page.dart
@@ -21,8 +21,6 @@ final _isolateSampleProfileRepository = new IsolateSampleProfileRepository();
 final _libraryRepository = new LibraryRepository();
 final _megamorphicCacheRepository = new MegamorphicCacheRepository();
 final _metricRepository = new MetricRepository();
-final _nativeMemorySampleProfileRepository =
-    new NativeMemorySampleProfileRepository();
 final _objectPoolRepository = new ObjectPoolRepository();
 final _objectRepository = new ObjectRepository();
 final _objectstoreRepository = new ObjectStoreRepository();
@@ -192,24 +190,6 @@ class FlagsPage extends SimplePage {
   }
 }
 
-class NativeMemoryProfilerPage extends SimplePage {
-  NativeMemoryProfilerPage(app)
-      : super('native-memory-profile', 'native-memory-profile', app);
-  @override
-  onInstall() {
-    if (element == null) {
-      element = new NativeMemoryProfileElement(app.vm, app.events,
-          app.notifications, _nativeMemorySampleProfileRepository,
-          queue: app.queue);
-    }
-    assert(element != null);
-  }
-
-  void _visit(Uri uri) {
-    super._visit(uri);
-  }
-}
-
 class InspectPage extends MatchingPage {
   InspectPage(app) : super('inspect', app);