Remove two unused functions from dart:sky.internals

sky/shell/ui/internals.cc

Index: sky/shell/ui/internals.cc
diff --git a/sky/shell/ui/internals.cc b/sky/shell/ui/internals.cc
index 96950997f0b91596431986140cc2c15f2c207160..039c323a9012e835cb92f795463f3ff21ce0f286 100644
--- a/sky/shell/ui/internals.cc
+++ b/sky/shell/ui/internals.cc
@@ -26,17 +26,9 @@ Internals* GetInternals() {
   return static_cast<Internals*>(state->GetUserData(&kInternalsKey));
 }
 
-void ContentAsText(Dart_NativeArguments args) {
-  Dart_SetReturnValue(args, Dart_EmptyString());
-}
-
 void NotifyTestComplete(Dart_NativeArguments args) {
 }
 
-void RenderTreeAsText(Dart_NativeArguments args) {
-  Dart_SetReturnValue(args, Dart_EmptyString());
-}
-
 void TakeShellProxyHandle(Dart_NativeArguments args) {
   Dart_SetIntegerReturnValue(args, 0);
 }
@@ -55,9 +47,7 @@ void TakeServiceRegistry(Dart_NativeArguments args) {
 }
 
 const DartBuiltin::Natives kNativeFunctions[] = {
-    {"contentAsText", ContentAsText, 0},
     {"notifyTestComplete", NotifyTestComplete, 1},
-    {"renderTreeAsText", RenderTreeAsText, 0},
     {"takeShellProxyHandle", TakeShellProxyHandle, 0},
     {"takeServicesProvidedByEmbedder", TakeServicesProvidedByEmbedder, 0},
     {"takeServicesProvidedToEmbedder", TakeServicesProvidedToEmbedder, 0},