[BugFix] missing deprecated kwargs

[fedebotu]

Description

The following code, passing the deprecated minimum and maximum:

from torchrl.data import BoundedTensorSpec

spec = BoundedTensorSpec(minimum=0, maximum=1, shape=(2,))

Raises the following error: AttributeError: 'BoundedTensorSpec' object has no attribute 'DEPRECATED_KWARGS'. This attribute was removed in a previous commit.

I simply modified the warning message to keep the current functionality!

Motivation and Context

(did not raise an issue since it is super simple and will only affect depracted usage of one tensor spec)

• I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

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

Checklist

• I have read the CONTRIBUTION guide (required)

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/rl/2125

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[vmoens]

Thanks!