Fix Squeeze shape inference (#3516)
Fix Squeeze shape inference (#3516)

* Return early only if axes spec wants to act on symbolic dim

Signed-off-by: Matteo Salvarezza <5cc4d7d2a3c5b6b6de4547e2d3aa0379122b94c8@gmail.com>

* Dont' predict a rank of 0 when shape can't be inferred

Signed-off-by: Matteo Salvarezza <5cc4d7d2a3c5b6b6de4547e2d3aa0379122b94c8@gmail.com>

* Remove symbolic dims in the axes spec, don't give up inference

Signed-off-by: Matteo Salvarezza <5cc4d7d2a3c5b6b6de4547e2d3aa0379122b94c8@gmail.com>
onnx/onnx,onnx/onnx,onnx/onnx,onnx/onnx