ipa: raspberrypi: Remove unused MetadataPtr

The Metadata class defines a shared_ptr named MetadataPtr.  It is not
used anywhere in the source code, so remove it.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>

src/ipa/raspberrypi/controller/metadata.hpp

@@ -10,7 +10,6 @@
 
 #include <any>
 #include <map>
-#include <memory>
 #include <mutex>
 #include <string>
 
@@ -108,6 +107,4 @@ private:
 	std::map<std::string, std::any> data_;
 };
 
-typedef std::shared_ptr<Metadata> MetadataPtr;
-
 } // namespace RPiController