Removed global set_default_validate_args

[mctigger]

Description

Removed global set_default_validate_args

Motivation and Context

Having it true deviates from the default PyTorch behavior and may result in errors not raised.

Types of changes

What types of changes does your code introduce? Remove all that do not apply:

• Bug fix (non-breaking change which fixes an issue)

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• I have read the CONTRIBUTION guide (required)
• My change requires a change to the documentation.
• I have updated the tests accordingly (required for a bug fix or a new feature).
• I have updated the documentation accordingly.

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[vmoens]

Thanks for this.

In principle I support this change!
The reason we had this was that within ProbabilisticTensorDictModule, setting this to False can speed up the construction of the dists.

What would you think of raising a warning if this is True in ProbabilisticTensorDictModule.__init__ to let users know that they could do things faster? Maybe it's an overkill, not sure. Another option would be to put a .. note:: in ProbabilisticTensorDictModule docstrings to let users know that setting this to False can speed up the construction of the dists at the expense of safety.

If you could add one of those I'd be happy to merge this!