remove tracing assertion

[Data-Iab]

Quick fix:

• Tracing assertion is removed from the BaseExporter.

[Data-Iab]

Tracing assertion is related to the disparity model, I suggest to move it to the DisparityExporter child class to avoid assertions for models that have tracing attribute.

[thibo73800]

@Data-Iab Is it not true that all model with the tracing property must be exported to onnx/tensorRT with tracing=True ?

[Data-Iab]

@thibo73800 well it depends on what tracing means, in AloDPTDepthSegmentation for example it does not refer to the same thing. For general purposes, we better handle assertions in child classes.