Delete clip_model to avoid errors on export (#18445)

Signed-off-by: Mohammed Yasin <32206511+Y-T-G@users.noreply.github.com>
Co-authored-by: Laughing-q <1185102784@qq.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/engine/exporter.py

@@ -285,6 +285,7 @@ class Exporter:
                 "(torchscript, onnx, openvino, engine, coreml) formats. "
                 "See https://docs.ultralytics.com/models/yolo-world for details."
             )
+            model.clip_model = None  # openvino int8 export error: https://github.com/ultralytics/ultralytics/pull/18445
         if self.args.int8 and not self.args.data:
             self.args.data = DEFAULT_CFG.data or TASK2DATA[getattr(model, "task", "detect")]  # assign default data
             LOGGER.warning(