Revert of [mojo] Enable ServiceRegistryImpl to override remote services

content/renderer/mojo/service_registry_js_wrapper.h

Index: content/renderer/mojo/service_registry_js_wrapper.h
diff --git a/content/renderer/mojo/service_registry_js_wrapper.h b/content/renderer/mojo/service_registry_js_wrapper.h
index 543d214c109dfb3588cace09b408d9a2d35e45b6..73046862dbbe26e70bc01dc5c98be50f1cd757e6 100644
--- a/content/renderer/mojo/service_registry_js_wrapper.h
+++ b/content/renderer/mojo/service_registry_js_wrapper.h
@@ -12,11 +12,7 @@
 #include "gin/handle.h"
 #include "gin/object_template_builder.h"
 #include "gin/wrappable.h"
-#include "mojo/public/cpp/system/handle.h"
-
-namespace v8 {
-class Isolate;
-}
+#include "mojo/public/cpp/system/core.h"
 
 namespace content {
 
@@ -37,8 +33,6 @@
       v8::Isolate* isolate) override;
 
   // JS interface implementation.
-  void AddServiceOverrideForTesting(const std::string& service_name,
-                                    v8::Local<v8::Function> service_factory);
   mojo::Handle ConnectToService(const std::string& service_name);
 
   static gin::WrapperInfo kWrapperInfo;