dgain: remove left-over debugging code

src/io_pipeline.c

@@ -521,12 +521,10 @@ init_controls()
                     state_io.camera->sensor_fd, V4L2_CID_DIGITAL_GAIN, &dgain_control)) {
                 state_io.dgain.control = dgain_control;
                 state_io.dgain.max = dgain_control.max;
-		printf("Have d/gain, max: %d\n", dgain_control.max);
         } else {
                 state_io.dgain.max = 0;
                 state_io.dgain.control.id = 0;
         }
-	mp_camera_control_set_int32(&state_io.gain.control, 768);
         if (state_io.dgain.control.id) {
                 state_io.dgain.value =
                         mp_camera_control_get_int32(&state_io.dgain.control);