[Extensions] Remove mechanism for non-generated schemas

extensions/common/extensions_client.h

Index: extensions/common/extensions_client.h
diff --git a/extensions/common/extensions_client.h b/extensions/common/extensions_client.h
index f1c9a27efae6a1a083a6f7ebff0afa9b7ae8f009..328731a2d8737a7208ea048556d883d4b0ea0ffb 100644
--- a/extensions/common/extensions_client.h
+++ b/extensions/common/extensions_client.h
@@ -93,10 +93,6 @@ class ExtensionsClient {
   // Gets the generated API schema named |name|.
   virtual base::StringPiece GetAPISchema(const std::string& name) const = 0;
 
-  // Register non-generated API schema resources with the global ExtensionAPI.
-  // Called when the ExtensionAPI is lazily initialized.
-  virtual void RegisterAPISchemaResources(ExtensionAPI* api) const = 0;
-
   // Determines if certain fatal extensions errors should be surpressed
   // (i.e., only logged) or allowed (i.e., logged before crashing).
   virtual bool ShouldSuppressFatalErrors() const = 0;