libcamera: Declare empty virtual destructors as defaulted

The base class of polymorphic classes is required to declare a
destructor. Several of these are empty, and can thus be declared as
defaulted.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <email@uajain.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/android/post_processor.h

@@ -16,7 +16,7 @@ class CameraMetadata;
 class PostProcessor
 {
 public:
-	virtual ~PostProcessor() {}
+	virtual ~PostProcessor() = default;
 
 	virtual int configure(const libcamera::StreamConfiguration &inCfg,
 			      const libcamera::StreamConfiguration &outCfg) = 0;