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

runtime/observatory/lib/src/models/repositories/sample_profile.dart

Index: runtime/observatory/lib/src/models/repositories/sample_profile.dart
diff --git a/runtime/observatory/lib/src/models/repositories/sample_profile.dart b/runtime/observatory/lib/src/models/repositories/sample_profile.dart
index ed38ba65243de1df3ac203c4af318144c7dfd45d..9f8e80ea7e18e18cba307a75f1f120f6d231f176 100644
--- a/runtime/observatory/lib/src/models/repositories/sample_profile.dart
+++ b/runtime/observatory/lib/src/models/repositories/sample_profile.dart
@@ -8,8 +8,6 @@ enum SampleProfileTag { userVM, userOnly, vmUser, vmOnly, none }
 
 enum SampleProfileLoadingStatus { disabled, fetching, loading, loaded }
 
-enum SampleProfileType { cpu, memory }
-
 bool isSampleProcessRunning(SampleProfileLoadingStatus status) {
   switch (status) {
     case SampleProfileLoadingStatus.fetching:
@@ -44,8 +42,3 @@ abstract class IsolateSampleProfileRepository {
       IsolateRef isolate, SampleProfileTag tag,
       {bool clear: false, bool forceFetch: false});
 }
-
-abstract class NativeMemorySampleProfileRepository {
-  Stream<SampleProfileLoadingProgressEvent> get(VM vm, SampleProfileTag tag,
-      {bool clear: false, bool forceFetch: false});
-}