libcamera: pipeline_handler: Remove Camera pointer from CameraData

There are no users left of this field, drop it.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

include/libcamera/internal/pipeline_handler.h

@@ -42,7 +42,6 @@ public:
 	}
 	virtual ~CameraData() = default;
 
-	Camera *camera_;
 	PipelineHandler *pipe_;
 	std::list<Request *> queuedRequests_;
 	ControlInfoMap controlInfo_;