[Extensions] Remove mechanism for non-generated schemas

extensions/test/test_extensions_client.cc

Index: extensions/test/test_extensions_client.cc
diff --git a/extensions/test/test_extensions_client.cc b/extensions/test/test_extensions_client.cc
index 1f0a8ce3451afc753c8f2df669e9677cbc8b71f1..a300274bcd902457bc903218d9a0628c49c4164c 100644
--- a/extensions/test/test_extensions_client.cc
+++ b/extensions/test/test_extensions_client.cc
@@ -138,9 +138,6 @@ base::StringPiece TestExtensionsClient::GetAPISchema(
   return api::GeneratedSchemas::Get(name);
 }
 
-void TestExtensionsClient::RegisterAPISchemaResources(ExtensionAPI* api) const {
-}
-
 bool TestExtensionsClient::ShouldSuppressFatalErrors() const {
   return true;
 }