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>

include/libcamera/ipa/ipa_interface.h

@@ -150,7 +150,7 @@ struct CameraSensorInfo;
 class IPAInterface
 {
 public:
-	virtual ~IPAInterface() {}
+	virtual ~IPAInterface() = default;
 
 	virtual int init(const IPASettings &settings) = 0;
 	virtual int start() = 0;