Allow using inference graph exporter in eager mode, since it works as long as we are using graph context.

PiperOrigin-RevId: 477530819

Author: lingvo-bot

lingvo/core/inference_graph_exporter.py

@@ -344,8 +344,6 @@ def Export(cls,
     Raises:
       ValueError: if the model does not support the listed subgraphs.
     """
-    if py_utils.IsEagerMode():
-      raise ValueError('InferenceGraph exporter does not work in Eager mode.')
     assert issubclass(model_cfg.cls, base_model.BaseModel)
     if device_options.dtype_override and device_options.fprop_dtype_override:
       raise ValueError(