gphoto2: remove patch already applied upstream (#380232)

diff --git a/gphoto2/main.c b/gphoto2/main.c

index 2bf5964..cd84467 100644

--- a/gphoto2/main.c

+++ b/gphoto2/main.c

@@ -1215,14 +1215,14 @@ start_timeout_func (Camera *camera, unsigned int timeout,

 	pthread_create (&tid, NULL, thread_func, td);

-	return (tid);

+	return (unsigned int)tid;

 }

 static void

 stop_timeout_func (Camera __unused__ *camera, unsigned int id,

 		   void __unused__ *data)

 {

-	pthread_t tid = id;

+	pthread_t tid = (pthread_t)id;

 	pthread_cancel (tid);

 	pthread_join (tid, NULL);

    sha256 = "sha256-t5EnM4WaDbOTPM+rJW+hQxBgNErnnZEN9lZvxTKoDhA=";

  };

  patches = [ ./add-type-casts.diff ];

  nativeBuildInputs = [

    autoreconfHook

    pkg-config